The United States section of FamilySearch's "published record collections" either has 746 or 747 databases.
This screen shot was taken at 6:30 pm central time on 11 November 2013.
I'm not certain why the difference.
The thing that always concerns me when I see things of this type is "what other things aren't working like I think they should?"
Hopefully it's just some minor human error. But when we rely on things (even free sites like FamilySearch) to work in a way we think they should, it always gets me wondering about how various search mechanisms on the site work as well.
If I get an answer, I'll post an update.