I choose Intel , because i have NEVER had any issues with any of their products. AMD make great CPU's, but the boards and chipsets can be crappy.
Intel chipsets, and boards are generally more reliable, and you have more options with Intel as well.
AMD, are lightning fast at games no doubt, and 64Bit will be great in about 12mths or so.
However my 3.2 Extreme Edition flys with my Max 3 board. The difference between the brands in gaming IMO are really not that huge.I think Intel is better overall, as it offers a better package, peripherals etc.
However, i won't say i will never use AMD in the future.
Whichever you go with , im sure you won't be disappointed.