I brought this up a while ago in another thread, but I'm hoping there are more folks around now who might have an opinion on the subject.  I'm at the point where I've accumulated enough OnDemand Rewards points to get a free full-length SANS course.  542 or 617 looks about right.
Both would serve me well in my current position, and while I'd love to further enhance my wireless knowledge, I also desperately need to learn the material 542 covers.  Perhaps I might practically get more out of 542, but I think I'd enjoy learning about wireless more.  One is more focused on upper-layer content while the other deals with infrastructure-level.  Achieving the GAWN certification (through 617) would probably be overall easier for me since I have some 802.1X experience, making me GSE-eligible (as if that really matters, to be honest).  542 would bring my understanding of web attacks up from "clueless" to "somewhat-informed."
I won't be taking a full-length course until some time next year as I simply don't have the time for it at the present.  There's also the eLearnSecurity Pro course which I still have access to and that covers a lot of the same thing 542 does, but SANS feels like they always give me a lot more.
I'm so torn.