I'm one of those people who doesn't really get Twitter. OK so I can tell someone straight away what I'm up to, and I can find out straight away what other people are up to. But thats pretty much it. I can't upload photos or videos or do anything that I can't already do using an IM client or a text message on my mobile. It doesn't solve any problems, or make things quicker or easier. So for me it's behind Facebook, instant messaging, and texting, which doesn't leave much point in me using Twitter. I wonder where it will be in 2 years? I don't think it will be anywhere near as popular unless it adds in new features.