I coded this AIM bot, quite a while ago, which lets you add/remove/search bookmarks. It was written using the C interface to Amazon’s SimpleDB and the AIM SDK. It’s pretty basic. Just send an IM to “whutsnu” on AIM, and he’ll reply with the list of commands.
The “export” command hasn’t worked for quite a while, because the domain expired. The other features work, though. This was originally meant to be one part of a larger project.