Signed up for Twitter. Following 7 twitters. Added it to my blog. Can't say much in 140 characters, but I guess it stops people from rambling about much of nothing. I can see how some people can get carried away and spend heaps of time with twitter and you can very quickly move from one twittter to another if you wish to reply to something that might catch your eye when you're twittering.
I didn't always find it as quick as '123' to reply to twitters as it wouldn't go through straight away, maybe its my computer or maybe twitter gets overloaded??
Like all of these social networking sites 'you have to be seen to be heard', so just another way for those that are interested or have the time to communicate.