Twitter is both a blog & messenging system
Twitrss.me - Get an RSS feed URL for your Twitter feed.
TweetDelete.NET - Let's you set your Tweets to automatically delete. You have options like 1 day, 1 week, 1 month, etc...
TweetDeck.com - Excellent Twitter tool if you are using are on a screen larger than a mobile phone. It allows you, amoung other things, to see multiple columns of tweets so you can watch (for example) everyone you follow, a watch list, notifications, your tweets, and messages all in separate columns.
@webulite - This site itself has a Twitter feed. Our Twitter feed is an aggregation of the blogs/podcast posts of our community members.