I just put out a new version of the Tweetbacks module I put online on Friday. The download URL is now <http://drupal.org/node/357978/release>. This new version includes support for all of the options for Dan Zarrella's Tweetbacks system, although described in slightly different terms.

Download it, and have fun!

UPDATE: Tweetbacks is now on drupal.org! It will be a little while before builds start appearing but from now on, project development will happen there. If you are interested in helping me maintain this module, let me know. Also, there are a couple little bugs in the version currently available on this site. Please wait for the fresh drupal.org build to show up; when that happens I'll be taking down the file from here.

UPDATE 2: Builds are now appearing on Drupal.org. I've removed the download from here, so you'll want to go to the actual project page from now on.