IMHO, before advertising, you should finish main features of this API. Getting bookmarks is great, but a lots of devs will try to use tags and/or lists.
To be honest, I'm writing a plugin for my weblog system (habari) which will integrate Diigo links as a silo. But now, I can't give it to users as "bookmarks" is the only feature available.
any news about API update? As of now, it only support "plain" links.