The new Facebook partnership has been great and it has attracted a lot of new developers to the site. Unfortunately, it has also attracted a lot of people asking completely off-topic questions and a ton of duplicates. For example, I think there are 15 questions a day asking why their Facebook like button doesn't work.
The Facebook tags also aren't comparatively all that popular from an answerer/views perspective so a lot of questions aren't gathering the close/delete votes that are needed to keep the mini-site clean. The hours of 11PM-6AM PST are especially bad. I could spend 5 minutes pulling together a list of 20+ bad off-topic / low quality questions that need to be closed but haven't gotten enough votes from just the last 3 days alone (or just look at my close vote history).
The current moderators have done a decent job, but I think electing someone dedicated (and restricted) to the Facebook mini-site could be a huge addition to this new partnership (and to everyone who has to see low quality Facebook questions on their home page).