Another option is to go to the Apple retail store nearest to you and see if there are people returning their week-old MBs due to the new model coming out. The returns will be in pristine shape with full warranty, but will be sold as "refreshed" units for 10% of the list price. These are not units with problems that have been fixed, like refurbs (which I like and buy a lot), but are just people who changed their minds. You'll need to ask a sales person for what they have as "refreshed" in the back. That's the magic word.
Good luck!
MacBook w/2GB & 100GB 7200 rpm hd, G5 iMac, 15PB, G4 iMac, Mac OS X (10.4.8) G4 QS, AX, 3G iPod, Shffl, nano.