Great post! This looks like its going to get interesting for sure.
I've seen this morning (or, this evening - depending on where you are) that Samsung have indeed counter-sued; but for breeches of their wireless patents. Someone called in earlier in the thread.
Like I said earlier, I think this is more about Apple trying to assert its dominance on the new gadget market - trying to discourage any more competition in the market. I for one don't think they can really claim copyright on the vast majority of whats presented there; they could have something on the design and feel of the OS though (not the specific icons).
I agree its lame to sue over it, but when your business is built on the look and feel of the device, I can see why they would be a bit miffed.