Here at Nottinghamshire Indymedia Towers, we are also experimenting with Twitter. Again, most useful for RSS notifications.

User name:  nottsindymedia

txt to +447624801423  <FOLLOW nottsindymedia>  from other & international mobile phones.
To stop receiving texts, send <LEAVE nottsindymedia> or <OFF>  to stop all notifications.
Send  <FOLLOW nottsindymedia>  to shortcode 86444  from Vodafone mobile phone.
If you don’t have a suitable mobile, able to take advantage of these services, simply go to where you can still follow events on the internet.

Well, none of us are putting 140 characters [like an sms] into twitter “what are you doing?” Well not yet, anyway. But it is an interesting method of doing urgent and breaking news I think.