The scary thing is that if the Navy Seals or some other branch of US Special Forces help free the UK sailors, which I sincerely hope they do, a large segment of the UK population will be thankless. They will claim it was our responsibilty in the first place because "Bush lied." It's terrible to think that about our closest ally, but unfortunately it's true. I hope the sailors are freed soon, God be with them.
I should imagine the SAS is on alert for this one. They're perfectly capable of taking out the Iranian trash, if they're allowed to. Our involvement would probably be to provide logistical support. In any case, I hope somebody kicks Iran in the teeth for this!