My opinion, FWIW, is that I think it is pretty obvious that Samsung did copy a lot of design elements from Apple. They weren't even subtle about, have you seen the comparison picture of the two dock connectors?
However, I don't see anything wrong with that. As long as it doesn't reach the level that consumers are genuinely confused about which product is which (which could be the case with some of the far east knockoffs, but not with a device with a big Samsung logo on the front), I don't see a legal issue.
Imitation is the sincerest form of flattery, and it shows Samsung must think Apple got a lot of things right.
Edit: Here is the picture
They even sell a 'USB Connection Kit', which is two adapters plugging into the 'dock connector', one for SD cards and one for USB leads. Hmm, I think I've heard of that before