A diplomatic shot across the Iranian's bow.
"We don't know how long we can hold back the Israelis, so consider your options."
Either that or Cheney just threw Israel under the bus...
Add to the mix Bush's inauguration speech where he expressed US support for all people striving for freedom everywhere, (read dissidents and students against the mullahs in Iran)......
I can imagine that the mullahs skivies are in a bit of a knot.....they have been playing with fire aiding the insurgents in Iraq...and I believe that Bush will not let it go on much longer without acting.
Near-future statement from Cheney - "Now why did those Iranians have to turn on those SAM radars? Since those radars could target USAF aircraft over Iraq, we had no choice but to turn them off remotely with HARMs. It just so happened that the IAF was also in the area and benefited from this, but that's one of those flying deals."
That's about the size of it.
It may be starting.