Paula: I just checked on the backlog. The numbers are really quite amazing! We've accomplished so much in the last few months.
There are currently 6644 pending merges. (By the way, this is down almost 300 from just 3 days ago!)
Of those, I think the oldest 1448 involve at least one private profile, meaning they are not auto-approved, and have to be completed by me or another sysop, unless the PMs return to complete them, which is unlikely at this point.
There are 303 auto-approved pending merges that can be completed (or removed, rejected, etc., as needed) by anyone.
The remaining 4893 pending merges are a combination of merges proposed in the last month (so not yet auto-approved) and a few private ones from before that. Nearly all of them are from within the last month. Wow! Nearly 5000 merges proposed in a month! That's awesome.