Brent Simmons of NetNewsWire fame has defined a couple of new clipboard formats specifically for handling RSS feed data: RSSi ("RSS Item") and RSSs ("RSS Source"). As far as I know NetNewsWire is the only app currently using these formats so... I've whipped up a free REALbasic class module to make getting and setting RSSi and RSSs clipboard datatype easy in any REALbasic app. (If you're building a Cocoa app, check out Brent's freely-available classes). If you're creating an RSS-using app, I urge you to consider supporting these formats - the more the merrier.