Disclaimer: could be a total coincidence, but it has been constant and annoying. With my 12" PB, I had perfect AirTunes performance. I live in a condo with tons of wireless networks around, but there were never any issues. It never cut out, and my airport reception always showed full. With my 15" C2D MBP, I am always generally one bar short of full reception and my AirTunes cuts out constantly. My reception seems fine because internet speeds are good and I can see a ton of networks I never used to see. But the AirTunes is sucking big time. This is all happening in a small living room with my Airport Extreme on one side of the room, my laptop in the middle, and an Airport Express on the other side of the room connected to my speakers. Has anyone else noticed this?