bob- I am having the same issues with wifi as you are. I have tried 10.5.1 and many other "downgraded" kexts as well as the en1 en0 fix (and just about every Broadcom walkthrough I could find). I found a topic on Insanely Mac once that said some HP models lock their wifi in their BIOS, hmm...I can confirm Ubuntu works fine for me on this systems though, why would OSX not be able to access the wifi if that was the case? Hm.

For me the wifi seems to be recognized when I boot, it finds the hardware address and in OSX it is recognized (although I get "Third party wireless card" as well) and my bluetooth does also work fine. I have the "baseball diamond" logo in the top right hand corner, but it seems no signal (whenever I try to join a network it can not find any routers). I have tried many different combinations of shutting down windows (hibernate, shut down) with no luck (I read this in a post somewhere). I did fix the audio using a topic from Insanely Mac (I'll have to look for it and post it here)...but the wifi is my biggest woe right now as well.

Damn doesn't anybody know how to fix this?