So, well, I have for a while now, but on the whole, I use it to notify updates on

Using the RSS feeds from these site, Twitter will notify you about the latest entry on them.

So …. my Twitter username is:  tashuk

Although RSS feeds and feedreader can do this of course, Twitter is a little ‘richer’ in its application. Further,  if you are a Vodafone user in the UK, it will send an SMS alert to your mobile, if you want it.

txt to +447624801423  <FOLLOW tashuk>  from other & international mobile phones.
To stop receiving texts, send <LEAVE tashuk > or <OFF>  to stop all notifications.
Send  <FOLLOW tashuk>  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.

Cool eh?