Twitter and its microblogging siblings let you follow a stream of one-line updates from your friends. It's pretty much the shortest form of social media out there... but that doesn't stop us from going on at length about it.  And we came up with five questions about Twitter:How do you know something is Twitter worthy?Who should you be following on Twitter?How can use Twitter to support what you're working on?How can Twitter support collaboration?What rocks out more -- Facebook or Twitter status updates? The tools we discuss include:TwitterFox for posting to Twitter from your web pageTwitter's Facebook app lets you keep your Facebook status updated from TwitterThe 10 Best Twitter tools for Wordpress blogs helps you integrate your tweets with your blog Podcast feed: here Or subscribe with iTunes