identi.ca
I've created an identi.ca account. My username is jkakar. I'm not
sure I'll actually use it, as this is my first time trying
microblogging of any kind. I often have ideas I think I should post
about and end up not doing so because writing well tends to take
more time than I think I have. Maybe identi.ca will be light-weight
enough that I'll actually use it.

One of the obvious things I could do instead of posting more things
here is write on my Facebook wall or update my status, but I
generally find Facebook very boring to use. I'm not interested in
logging in a hundred times a day to see if anything has changed and
I also don't want to be bombarded by notification emails with
nothing in them but a link that invites me to login to Facebook.

From what I can tell, identi.ca is more about real-time
conversations than random status updates. There does seem to be a
lot of useless "Bob is just about to go to bed" tweets, but
hopefully subscription will make it possible to filter out people
that don't actually have anything interesting to say. I'm also
attracted to the fact that it's integrated with Jabber, which means
I can use the chat tools I'm familiar with to interact with it.

We'll see how it goes!