The Ever Present Terrorist

I was reading over at the Washington Note by Steve Clemons (by the way I really like Steve's work) regarding an article by Nir Rosen , which seems to be a well informed picture of Iraq right now (minus Candy Cane Mountain and Children with Flowers).
But there was a comment in Mr. Clemon's reaction to the piece that struck me,
I'm paraphrasing now(by the way I love the Wash Note, but it doesn't let me highlight and copy which is a bummer) but Clemons asked a Saudi foreign minister what kind of trouble he evnisioned for the future and the Saudi official remarked that the dilemma was going to be what do we (the Saudis) do with the foreign fighters now in Iraq if Iraq is ever pacified.
I think this is a discussion that we need to discuss.
This seems to set up a situation awfully similar to 9/11 where even if we pacify Iraq the overflow of jihadi influenced youth will remain (we can't kill them all) and where will they go. If this sounds too familiar to the rise of al Qaeda after the Soviets left Afghanistan than you're on the same page with me.
The questions as I see them are where do these foreign fighters (very often Saudi) go after Iraq?
Do they target Saudi?
If not Saudi, where? America?
What would an attack on Iran do to these Sunni partisans, would they be wiling to fight for the Shiite Iran, or would they take advantage of regional instability to expand their terror campaign.
Would a pullout of American troops from Iraq play a role in spreading these terrorists throughout the mid-east?
Or does our presence help keep these fighters from terrorizing the Shi'ite population of Iraq?

In the end I agree with Mr. Clemons in that we need strategic thinking about the aftermath of theIraq war in regards to the jihadi element we have drawn to Iraq and thus benefited with advanced training against the u.s. army.
Answers, I don't really have any for now.