MBP has dual-channel memory, one DIMM slower than two.
Just to make everyone second-guess their orders....
According to page 14 of the '
MacBook Pro Technology Overview', the MBP does have 'dual channel memory'. This means that if you install memory in pairs, the computer will be faster than with just one DIMM. (10.6 GB/s of bandwidth as opposed to 5.3 GB/s.)
So everyone who opted for the more expensive single-DIMM config of 1 GB RAM, you would end up with a faster computer with the $100-cheaper two 512MB sticks. Of course, then it becomes harder to upgrade, as you'll have two 512MB sticks to do something with.
(Me? I ordered the 1 1GB stick version, because I'm going to get a second 1 GB stick from Crucial. I considered going for the 2x512 model, buying two 1 GB sticks from Crucial, and selling the two 512 sticks on eBay, but that was too much work.)
And I lucked out today. One of my customers just bought the Sony equivalent of the MBP (15.4", 1280x800 display, 1.66 GHz Intel Core Duo, 1 GB RAM, nVidia GeForce Go 7400 graphics, ExpressCard/34 slot, even a Sony 'MotionEye' built-in webcam, although theirs is USB-connected,) and it came with an ExpressCard/34 memory card (MS/xM/SD) reader. This is in addition to the built-in Memory Stick reader. She saw it in the box, asked what it was. I told her, explaining that the computer has a Memory Stick reader built-in, and this was for people who use xM or SD cards. She replied "Well, I have a Sony digital camera, and don't even plan on connecting it to this notebook, since I hook it up to my home computer. Do you have any use for it?" CHA-CHING! Now I don't need to go hunting one of these bad boys down!
The Sony is much heavier than the MBP, though, and has a lot of 'extra space' around the screen and is more brick-like in shape than the sleek Apples. (14.41"Wx10.81"Dx1.39"H, 6.17 lbs. vs. 14.1"Wx9.6"Dx1.0"H, 5.6 lbs.) Only Sony's 4-pin unpowered FireWire, lower resolution screen, marginally worse video chip (which is optional, the much worse Intel chipset 'processor-based' video is standard.) But it did have a few things that would have been nice in the MBP: Faster processor option (up to Intel's fastest 2.13 GHz model,) Dual-layer SuperDrive (theirs is tray-load, though,) S-Video out natively, three USB ports, and a CardBus slot in addition to the ExpressCard slot. And their model configured like the $2500 MBP only costs $2025. (If you configure it like the $2000 MBP, it's only $1615.) But, I'm willing to pay $475 for the sleek Apple product plus OS X.