I bought my copy at Media Play last weekend - nobody carded me, but then again Media Play typically doesn't care jack about things that go on in their store - be it breaking street date by a full three weeks on the special edition Star Trek II DVD or whatnot - unless it's porn you're trying to buy.
Slightly OT, but you should have seen how much trouble they gave the hillbilly that looked like he crawled out of the trailer park when he tried to buy one of those real life sorority chicks videos.
But anyway, my point was going to be that I had just decided I'd have to buy the damn thing online because it didn't look like anyone in the area was going to carry it from that mature content label. Media Play, the last place in the world to get new D&D books in stock, is the only place that had it. Imagine that.