Meh I don't see any real point to it . However you might want to add Mill to the list if you are going ahead.
The only way this could work is if its top quality, virtually finished maps, which are then put into a pack, with its own nifty page like Nineaxis does and then its publicised by Valve on the TeamFortress blog, if that happens, the playing of these maps will go up as server owners will be more likely to put them on.
If we do this, we have to keep in mind the filesize, we don't want to end up with a map pack that's over 1GB.
So basically, maps that are in RC?