If the Iranian seizure of British sailors was intended to try to dissuade the UN from sanctions, it didn't work: more sanctions have been placed on Iran. The sanctions aren't, (according to the Herald Tribune), that much worse than the ones that were already there, but the resolution was unanimous, suggesting that any attempt to play the security council against itself is unlikely to be effective.
For its part, Iran has been defiant, calling the sanctions "unlawful and unjustifiable" and vowing that they will have no effect on its nascent nuclear program. That may be true, but it may also be a show of bluster for the cameras and to keep spirits high back home. Since the nuclear program appears to be very popular with the Iranian public, that wouldn't surprise me.
More as this develops, but in the meantime: you folks know as well as I do that Ahmadinejad's Visa got scuttled. If THAT doesn't stink of this White House, what does?