Blizzard said that you can send them a message requesting a map to be featured. How to do so is written on the blizzard site where they describe the currently featured maps. (or, it was last I checked)
My map is awesome... or at least I think so. It did pretty well for about a week before the novelty of it wore out. Still I have fun with it, a game or three a day.
That is pretty funny though, promoting Crush Company like that.
I tried your map today. Only one of the three players was able to actually garrison units in the city structures and overall it was just really confusing. I also didn't seem to have any choice as to which type of units I could produce. I like the concept a lot, but it needs work before I'd consider it playable.
That's unfortunately, the correct answer. Just confirming it in case anyone was wondering, :P. But hey, maybe if your map gets enough Mapster publicity, Blizzard will hijack it from our news and feature it on Bnet.