Google Penalizing Sites Running Coop?
 

There seems to be a growing number of webmasters who run Digital Point's Coop on their site seeing heavy penalities placed on their sites' SERPs in Google. Is it a coincindence, related to recent Google heaves or is it a definite Coop based penalty? The waters seem muddy at present (come back Matt...) and many are sceptical that it's a penalty aimed at Coop users........More At.......

Digital Point's Coop is a big network how can google do it. Well at Google everything is possible

Yahoo! is Penalizing Co-Op Sites More here
http://forums.digitalpoint.com/showthread.php?t=41569