Some updates of our latest progress--
Facebook announced that there's now a mentions API. We're going to add support for this to the plugin, rather than doing feed publishing. This should have a huge benefit to our already-existing mentions meta boxes. Read more here:
Also, we're polishing up 1.0.3, which includes a bunch of bug fixes. You can see more in the changelog at https://github.com/facebook/wordpress/blob/master/readme.txt.
Better Comments support
Rishi has been cranking at making comments much better for you. You can follow along at https://github.com/facebook/wordpress. This will likely launch as part of a 1.1 update.
Thanks and please continue giving us feedback!