tinyExpander is a tool for resolving compressed URLs -- the kind often used in Twitter to save character space. In fact, tinyExpander was written to provide a URL-expanding API for a custom Twitter client. Now it's open to everyone.
For an example of how tinyExpander can be used, check out tinyLinkFeed -- an RSS feed generator for links posted to Twitter.
Details to come...
tinyExpander was written by Erik Smartt (AKA @smartt.) It's powered by Python, Google App Engine, and coffee.