2-3 ideas.
1). I know this has been suggested, but I'll say it again since it goes with my other ideas. Searching for player made maps by name. Its going to needed as maps come flooding in.
1.5). A page number for scrolling the maps. Right now to get to page 30 you need to click 30 times..bit annoying.
2). New section in the forum to just talk about player maps. Challenges to your map could also be made here, ect. Of course for this to be useful idea 1 would have to be implemented first.