You mentioned the Air. I was in the Apple store dithering between that and the MBP13. In the end it was the the larger battery that tilted me.

I was a little concerned that this happened just before the new year model pc's would be arriving in 3 weeks. But after only a couple days, I've no regrets, and don't expect that any of the "thin n light" machines soon to arrive will change that.

I did have a problem with the included Snow Leopard disk. The MBP would load it, slowly, present the install icon, the process would seem to start but hang with an error. The Staff at the Apple store worked some magic and replaced the disk, which loaded immediately and worked without a hitch.

Net speed is much improved over the Sony.
Comcast speed test:
Download Speed: 8363 kbps (1045.4 KB/sec transfer rate)
Upload Speed: 3726 kbps (465.8 KB/sec transfer rate)

I've seen that test hit nearly 12000 kbps.

The Sony via 802.11g never pulled more than ~4000kbps.