I am also a sceptic like you.
agree that it is NOT complete, but internet itself is not complete yet.
am not ‘fighting’ for twitter, but my observation is that without twitter, I did not give 2nd thoughts to ANY blog, and did not even write one (despite I am in technology/telecoms to be precise)..
So, like facebook, I was going to advise/help a firm and they had ‘widgets’ on it, but I could not possibly comment until/I created an a/c and start using it a while.
I am curious also to see your thoughts after finally you start using it.