Twitter is really just another message technology but can be hooked together in unique ways via its API and other web sites that help to use a messaging service in novel ways. You might ask yourself, why bother with some of these 'mashups' of information into your Twitter account. But in reality it is for convenience and to simplify all the places you may be present. The last link is the most versatile for some things I'd like to implement using twitter.

Examples can be using twitter to notify you when your server stops responding on the internet, or when someone comments on your blog posts, when you want a reminder from your calendar appointments.

Create reminders from google calendars that tweet you in advance of your appointments.
http://geekswithblogs.net/Lance/archive/2007/08/09/TwitterMinder---Googl...

Twitter search all tweets based on keywords
http://search.twitter.com/search?q=bluedog3401

Twitter agent consolidating your messaging:
http://tinyurl.com/twitteragents

That's it for now. You can find me on twitter via bluedog3401