OK, so I have managed to stump the advanced wireless tech at Apple. I too have the wifi dropping problem that I have seen numerous times on here. Strange thing about mine (and maybe others) is that as long as iStumbler is running, the connection is solid and fast. Quit iStubmler and it fades out. I just got this thing last Friday so I am waiting to see what they want to do. It does it at home and at a public hotspot so the router is out. I have installed and configured wireless systems for 10 years so I knew my router was not the problem. It must be some sort of hardware problem. It made no difference before or after the OS update either. Just wanted to share.. BTW, this is my first MAC and I am not letting this problem change my opinion. After 20 years of desktop installation and support on the PC side, I am excited to start my MAC venture. Hey, at least I am getting a crash course on the networking interface.