From their site:
Tweetake is here to allow you to back-up your followers, people you are following and Tweets with just one click.
Why bother to do this? Many reasons:
* Twitter may lose followers again like it did in June / July
* You may change your Twitter name and want to re-follow the people you were following, and contact the people who were following you
* You may want to refer to a Tweet that you sent more than 90 days ago (the longest twitter keeps Tweets for)
* You may just like backing things up, ‘just in case’, like us :)
We’re not affiliated with Twitter in any way, we just thought this would be good for our own personal use, and decided to make it available for the world at large too. via: tweetake.com