Interesting take, Paul. I haven’t used the others in any major way, and recently posted on my confusion as to why Twitter is as popular as it is – http://out-think.blogspot.com/2008/06/is-twitter-best-web-20-concept-ever.html“ rel=”nofollow”>Is Twitter the best web 2.0 concept ever devised?

I look forward to the time when there is one central place where all conversation takes place, but considering the constantly changing and adapting web universe, chances are good we’ll never see that day, as there will always be something new to try.

After reading this, I might just try those other ones though.