I recently joined twitter and I must say I find it to be a good concept, but just slightly too short to be fun. For instance, I can't post limericks on Twitter because the average limerick is about 170 characters (which is above the 140 character limit of Twitter). In response to that I have composed the following limerick...
There once was a website named Twitter
Who's posters did grin and titter
At the small blogs they post
While buttering their toast
But to me it just looks like much litter.