Oh! I really like this idea! In fact, would it be ok if I expanded on it a little? Ok, what if, at the top of the index page here on the forums, there was something like this:
[1][2][3]
[A][B][C]
OR alternatively:
[1][2][3]-[A][B][C]
(And no, it has nothing to do with that song. >_< You know what song I'm talking about)
1 2 and 3 would be the three most recently ranked beatmaps, while A B and C would be three unpopular (but good) beatmaps of the staff's choice, and it would cycle every day, with one song being removed and replaced by a new one. Every song would stay up there for 3 days.
I don't know about everyone else, but I think this is an excellent idea. It would really help drum up popularity for all the overlooked beatmaps that are ranked, but never played.