Groklaw's patent page might give you a lead:
http://www.groklaw.net/staticpages/index.php?page=20050402193202442

Also take a look at this (Groklaw) posting:
http://www.groklaw.net/article.php?story=20070617081530669#c585343

Update: ...and take a look at the peer-to-patent project, here:
http://www.post-issue.org/