[As ever, you can read this on the BBC News website]
Twitter, despite the attention it receives around the place with its high-profile users like Stephen Fry, is not the only micro-blogging service out there.
I quite like Tumblr, and Stumbleupon does something useful, while BrightKite links notes and photos to your current location and is growing fast.
One service I never really tried seriously is Pownce, and now I’ll never get the chance as the company has been bought by Six Apart and is going to be shut down.