It wouldn't be good for the west in general. The Saudi royals have screwed their people for generations, and in response have created an angry, radical Wahabbist population that, unlike Egypt, would install an extremist Islamic government and declare jihad on the entire west. The bulk of 9/11 bombers came from this angry population. However, the Saudi royals, unlike Mubarak, have total control of their military and no qualms about slaughtering thousands of protesters on the streets, so I don't see regime change happening. The Saudis, however, would be so pissed they'd blame the US for encouraging all these "freedom" demonstrations, and the USA can kiss it's cordial relationship with the Saudi government goodbye.
Jordan would be a big loss, since the government there is secular, and the King of Jordan has been a staunch US ally. Unlike the Egyptians, much of Jordan's population is islamist, with radical beliefs. If they brought down the government, including the King, it could go to a radical Islamic theocracy. Not good. I don't think the King would turn his military loose to slaughter the protesting populace either. So I'd be worried about Jordan.
Thing is, that's what happens when people have been oppressed for decades, impoverished and ignored. Eventually they want freedom, and they'll die to get it.
This isn't America's fault. We have to deal with the governments the world gives us. We didn't put Mubarak in power, nor the King of Jordan, nor the Saudi royal family. But peaceful protests for freedom and democracy? There's no way the USA could ever publicly frown upon that and not loose all credibility.
