I always wondered when I saw 'Tweet This' button on popular blogs for sharing bookmarks and links. However there was no easy way to go back and search/manage the bookmarks tweeted by you. We have developed an application www.birdpie.com which stores all of the URLs (Web Links) you have entered on Twitter as bookmarks, so you can refer to them at a later date. The application takes care of minified urls to avoid duplication and pulls information from the url to auto-tag and assign a proper title. Some features are pending (like search bookmarks with keywords, etc) but they will be pushed soon.
I'd love to have feedback on its features, appearance or improvements.
Thanks!