Conor Friedersdorf is a twitter skeptic:
In Washington DC, many of my friends use Twitter to say that they’re going to be grabbing a drink at such and such bar after work, or that they’ll be on a panel at such and such think tank. I predict that within a year or two, either the wider Twitter frenzy will die down, or else all these people will switch to a Twitter replacement that is more exclusive, or at least provides a better way to separate “Tweets” one actually wants to get from “Tweets” one doesn’t. At that point, Twitter will look a lot like MySpace does today — it’ll be populated mostly by people who would use a more exclusive platform to raise their public profile or sell their product or whatever, if only there were another platform willing to grant them access to an audience.
The Dish 