There are all sorts of exclusivity arrangements or vendors selling only their own branded wares or that of their partners in their own store. It's not like Apple invented this scheme. For a very long time telcos selected every single application that was allowed to run on their network.
Consumers have their own means of defending against such practices. They can simply stop buying iPhones for instance. It's not like there were no alternatives. As a consumer, in this case, I have to say don't need the government.
(hm, the implicit conclusion is that I'm not hip...)
I suppose the question is whether the concerns of one marketplace (handsets) should override theneed of another (apps). As someone who hasalready bought an iPhone for what is a considerable amount of money, I don't like the turn towards crippling a product I thought was mine.
I think Apple's locking out of Google is very similar to Microsoft's locking out of Netscape. It's reasonable tobring the samre monopolies law to bear, I think.