Script Summary: Download ALL your tweets! On a Twitter user page, click on the Harpoon link in the sidebar to download their tweets! It may take a while :) Now supporting downloading of favorite tweets!
HARPOON is a simple script to give you back your tweets. Own them, back them up, search them, plaintext them... Install it and navigate to your Twitter user page, twitter.com/YOUR-USER-NAME. You’ll see a new item in your sidebar: Harpoon!
Click it to start downloading ALL your tweets, which will be displayed as soon as they’re downloaded. Note that if you have thousands of tweets, the downloading will take a while.

Now that you have all your tweets on one BIG page, searching them is as simple as using Firefox’s find in page. Backing them up is just a matter of File > Save Page As, or you can use the nifty Scrapbook extension to save it and keep it handy.
Personally, I just copy-pasted the whole shebang to a text file, which is what the script is optimized for. My idea was not to loose any information on the way to all text, so the “about 5 minutes ago” dates are fixed, and all important URLs (the tweet’s, the reply-to’s) are made visible
Hope it’s useful.
Inspired by the Format Amazon Wishlist script.
Update 13/Nov/2009: Fixed breaking of the script from minor changes on Twitter's part. Simplified code. Added downloading of favorite tweets!



