They'd have a hard time suing organic aggregators like Digg since most news sites are running their buttons. I COULD see an RIAA-style campaign where they just

They'd have a hard time suing organic aggregators like Digg since most news sites are running their buttons. I COULD see an RIAA-style campaign where they just start suing bloggers left and right for copy-pasting too many characters in their posts. Also, I could see Techmeme getting sued. Basically, anyone who's going out and TAKING content from the news orgs and repurposing it for their own ends could be a target if they go that route. Forums and social news sites should be pretty safe.