diff -u Filter_org/Delicious.pm Filter/Delicious.pm
--- Filter_org/Delicious.pm	2006-12-05 16:01:24.000000000 +0900
+++ Filter/Delicious.pm	2008-10-29 21:11:42.000000000 +0900
@@ -4,70 +4,68 @@
 
 use Digest::MD5 qw(md5_hex);
 use Plagger::UserAgent;
-use XML::Feed;
+use JSON::Syck;
 
 sub register {
     my($self, $context) = @_;
     $context->register_hook(
         $self,
-        'update.entry.fixup' => \&update,
+        'update.feed.fixup' => \&update,
     );
 }
 
 sub update {
     my($self, $context, $args) = @_;
 
+    my @permalink = map $_->permalink, $args->{feed}->entries;
     my $interval = $self->conf->{interval} || 1;
-    sleep $interval;
-
-    my $md5  = md5_hex($args->{entry}->permalink);
-    my $url  = "http://del.icio.us/rss/url/$md5";
-
-    $self->log(info => "Going to fetch $url");
-
+    my $json_url = "http://feeds.delicious.com/feeds/json/url/data?hash=";
     my $ua  = Plagger::UserAgent->new;
-    my $res = $ua->fetch($url);
-
-    if ($res->is_error) {
-        $self->log(error => "Fetch URL $url failed.");
-        return;
-    }
 
-    my $feed = XML::Feed->parse(\$res->content);
+    my %delicious = {};
+    while (my @links = splice(@permalink, 0, 15)) {
+        $context->log( info => 'Requesting json call to delicious with '
+                . scalar(@links)
+                . ' link(s)' );
+        my $url = $json_url . (join '&hash=', map { md5_hex($_) } @links);
+        $self->log(info => "Going to fetch $url");
 
-    unless ($feed) {
-        $context->log(warn => "Feed error $url: " . XML::Feed->errstr);
-        return;
-    }
+        my $res = $ua->fetch($url);
+        if ($res->is_error) {
+            $context->log(warn => "Fetch error $url: " . $res->http_response->message);
+            next;
+        }
 
-    for my $entry ($feed->entries) {
-        my @tag = split / /, ($entry->category || '');
-           @tag or next;
+        my $data = JSON::Syck::Load($res->content);
+        unless (ref $data eq 'ARRAY') {
+            $context->log(warn => "json parse error: $data");
+            next;
+        }
 
-        for my $tag (@tag) {
-            $args->{entry}->add_tag($tag);
+        $context->log( info => 'json request success.' );
+        for my $h ( @{$data} ) {
+            next if !$h || !$h->{url};
+            $h->{url} =~ s{\\/}{/}mosixg;
+            $delicious{ $h->{url} } = $h;
         }
+        sleep $interval if (@permalink);
     }
+    for my $entry ($args->{feed}->entries) {
+        next if (not defined(my $info = $delicious{$entry->permalink}));
 
-    my $delicious_users = $feed->entries;
-    if ($delicious_users >= 30 && $self->conf->{scrape_big_numbers}) {
-        my $url = "http://del.icio.us/url/$md5";
-        $self->log(info => "users count is more than 30. Trying to scrape from $url.");
-        sleep $interval;
-
-        my $res = $ua->fetch($url);
+        my $delicious_users = $info->{total_posts} || 0;
 
-        if ($res->is_error) {
-            $context->log(warn => "Fetch error $url: " . $res->http_response->message);
-            return;
+        $entry->meta->{delicious_rate} = rate_of_color($delicious_users);
+        $entry->meta->{delicious_users} = $delicious_users;
+        $entry->meta->{delicious_top_tags} = $info->{top_tags};
+        $entry->meta->{delicious_hash} = $info->{hash};
+
+        next if (!$info->{top_tags} || !(ref $info->{top_tags} eq 'HASH'));
+        for my $tag ( keys %{$info->{top_tags}} ) {
+            $entry->add_tag($tag);
+            $self->log(debug => "add tag $tag");
         }
-
-        $delicious_users =
-            ( $res->content =~ m#<h4[^>]*>[^<>]*this url has been saved by\D+(\d+)#s )[0];
     }
-    $args->{entry}->meta->{delicious_rate} = rate_of_color($delicious_users);
-    $args->{entry}->meta->{delicious_users} = $delicious_users;
-    $self->log(info => "set delicious_users to $delicious_users");
 }
 
 sub rate_of_color {
@@ -106,6 +104,8 @@
 
 =head1 SEE ALSO
 
-L<Plagger>, L<http://del.icio.us/help/>
+L<Plagger>, L<http://delicious.com/help/api>
+L<Plagger>, L<http://delicious.com/help/feeds/>
+L<Plagger>, L<http://delicious.com/help/html>
 
 =cut
diff -u Filter_org/HatenaBookmarkUsersCount.pm Filter/HatenaBookmarkUsersCount.pm
--- Filter_org/HatenaBookmarkUsersCount.pm	2006-12-05 16:01:26.000000000 +0900
+++ Filter/HatenaBookmarkUsersCount.pm	2008-10-29 21:11:48.000000000 +0900
@@ -16,6 +16,7 @@
     my($self, $context, $args) = @_;
 
     my @permalink = map $_->permalink, $args->{feed}->entries;
+    my $interval = $self->conf->{interval} || 1;
 
     while (my @links = splice(@permalink, 0, 50)) {
         $context->log(info => 'Requesting XMLRPC call to Hatena Bookmark with ' . scalar(@links) . ' link(s)');
@@ -37,6 +38,7 @@
                 $entry->meta->{hatenabookmark_users} = $count;
             }
         }
+        sleep $interval if (@permalink);
     }
 }
 
diff -u Filter_org/LivedoorClipUsersCount.pm Filter/LivedoorClipUsersCount.pm
--- Filter_org/LivedoorClipUsersCount.pm	2006-12-05 16:01:27.000000000 +0900
+++ Filter/LivedoorClipUsersCount.pm	2008-10-29 21:11:51.000000000 +0900
@@ -16,27 +16,31 @@
     my ( $self, $context, $args ) = @_;
 
     my @permalink = map $_->permalink, $args->{feed}->entries;
+    my $interval = $self->conf->{interval} || 1;
 
-    $context->log( info => 'Requesting XMLRPC call to livedoorClip with '
-            . scalar(@permalink)
-            . ' link(s)' );
-
-    my $map = XMLRPC::Lite
-        ->proxy('http://rpc.clip.livedoor.com/count')
-        ->call( 'clip.getCount', @permalink )
-        ->result;
-
-    unless ($map) {
-        $context->log( warn => 'livedoorClip XMLRPC failed' );
-        return;
-    }
+    while (my @links = splice(@permalink, 0, 50)) {
+        $context->log( info => 'Requesting XMLRPC call to livedoorClip with '
+                . scalar(@links)
+                . ' link(s)' );
+
+        my $map = XMLRPC::Lite
+            ->proxy('http://rpc.clip.livedoor.com/count')
+            ->call( 'clip.getCount', @links )
+            ->result;
+
+        unless ($map) {
+            $context->log( warn => 'livedoorClip XMLRPC failed' );
+            return;
+        }
 
-    $context->log( info => 'XMLRPC request success.' );
+        $context->log( info => 'XMLRPC request success.' );
 
-    for my $entry ( $args->{feed}->entries ) {
-        if ( defined( my $count = $map->{ $entry->permalink } ) ) {
-            $entry->meta->{livedoorclip_users} = $count;
+        for my $entry ( $args->{feed}->entries ) {
+            if ( defined( my $count = $map->{ $entry->permalink } ) ) {
+                $entry->meta->{livedoorclip_users} = $count;
+            }
         }
+        sleep $interval if (@permalink);
     }
 }