IMHO it would be really nice if you could type in a name (or perhaps partial name, the the mall) and see the matching item(s).
Failing that, there's one interface nuisance that could be fixed. Why not put the filter dropdown on the marketplace front page so we don't have to visit the (painfully slow) "whole list" page first? I realize I don't have to actually wait for the entire list to load, but don't like the loud creaking noises my browser makes.
