Gwibber in 12.04 no longer works with Twitter. (I believe because the API changed). It appears that its replacement, friends-app, cannot be installed in Precise (as per Install latest Gwibber (friends-app) in Ubuntu 12.04?).
So what's a replacement/workaround for a Twitter client in Ubuntu 12.04? I've tried Hotot and it's also broken for the same reason.