Google's attempt at open-source Android apps has been... weak... at best. (Hello, "Mail".)
Google's "Google Experience" is also silly. There is a tablet/media player coming out soon that has Android. (Archos 5) But it won't play YouTube videos because the device does not meet the "Google Experience" criteria due to not having a camera. If you want YouTube, Gmail, and Google Maps, your device has to have a camera. WTF, Google?
(Ironically, I think the iPod Touch has Google Maps but doesn't have a camera. So Google is actually encouraging users to use their competition's product instead of their own. WTF, Google?)
(That's not to say that there shouldn't be free alternatives developed.)
That said, as a user of CyanogenMod on my G1, I'd be absolutely heartbroken if his builds could no longer distribute these apps.
Not sure that this is such a good idea. As soon as someone builds a phone that is otherwise up to spec but doesn't have a good enough camera, it loses Google Maps. Then the users say, "Android sucks, I can't even see maps" and buys an iPhone instead.
When it comes to the consumer, they're not going to even know what Android is. Go ask any Nokia owner if they like their Symbian phone.