I am currently playing around with Twitter, a nice tiny community tool that basically lets you log what you are doing at any time from the web, your mobile (through SMS) or IM… (basically a tool inbetween the blog and IM).
You can then also add friends to your list and when logged in your homepage will then aggregate all their posts.

Few thoughts…
Why not providing a mobile web interface to update your twitter ? This tool targets also – mainly ? – people on the move! You can update your feed by SMS but why not making it possible through the mobile web ?
Maybe even more important, why can’t I check my friends timeline through my mobile ? Nothing difficult there (it is just text and a picture for the avatar) ?

Using Feed2Mobile…
Thanks to RSS feed provided by Twitter and Feed2Mobile you can read your friends twitter on your mobile and imho this is getting really interesting. Here is my Twitter timeline. There is even a feed for the aggregating view of your friend, you can then just read all your aggregated friends content on your mobile..

Twitter also has an API

Verifying mobile phone number…
Somehow this is a “personnal” note as I find the process interesting…