"Seems like Summize was a virtual federated system for search and discovery of tweets. and people were using it for discovering @ replies too. Maybe all we need is for the posting services like Ping.fm to cache tweets and expose pre-submitted tweets to Summize, and then Summize can search across these caches. Totally seems possible, and why wouldn't Twitter want to do this with Summize? BTW, I still miss Summize classic branding. It seemed "smarter" with the old branding than with the new Twitter color scheme that just evokes Fail Whale to me!" - Elliott Ng