ESPN has an interesting take on the candidates. Short answer: hire a foreigner.
Oddly, the article does not seem to think the USMNT coaching job is an attractive position. I would think the exact opposite: low downside risk on reputation if the US flops, but with a HUGE upside if things go very well in 2010. Sure, maybe Scolari or Hiddink do not have that much to prove, but I can't believe that Russia offers a better situation then the US. Metsu does not do much for me, but Gerets is an intriguing possibility. I also would add Dick Advocaat, who might want to polish his resume a bit more.