Sadly this has absolutely trashed the wireless on my MB C2D, I cannot get any AirPort connection now at all no matter what I try. I guess I'm going to have to downgrade out of this update somehow. Funny that it works with my iMac CD connecting to the same router using the same settings, but not at all with the MB. Oh well.
<EDIT> After checking out everything, it was time to simply ditch my 3 year old D-Link wireless router. Evidently the wireless cards in the Intel based Macs just don't seem to get along well with older D-Link routers for some reason. Anyways, after picking up a dirt cheap new Belkin 54g router, everything is now working perfectly again.
yes, this update also trashed my wireless on my mb c2d.. isn't there any way to 'uninstall' a software update? i ended up reinstalling os x and making this update inactive