This one sort of slipped through the cracks on us, but AT&T and Apple have doubled the size of the "over the air" app downloads to 20MB. The update came sometime earlier this week. Is this a good move? Perhaps AT&T is getting cocky with all of that extra bandwidth they have laying around.
Update: We're hearing that the limit was raised in Germany and Canada as well, so we're going out on a limb and saying it is global.