You've misread all the articles.
Let me toss them all away with this statement. -> Laptops are not desktops. Laptops are finely engineered units which you will not overclock or fiddle with.
As to the 64-bit question, I've witnessed the transition in the "workstation" AKA SUN computers and others from 32 to 64-bit and the changeover was much faster than anyone expected. If you go with the Athlon 64, you can run XP 64 now, and the XP 32-bit SP2 will use its externsions as well.
If you stick with 32-bit, my best advice is to not overinvest and to think that you are buying a two year machine.
I am looking to purchase a notebook for college. I'm looking into a few offers for a solid work/gaming machine.
I have read reviews and looked at benchmarking tests that with the right memory (DDR400 3200?) The 64 will perform better in games than a pent3.2.
My question. Given the fact that games are always kicking up the system requirements, will the 2.2ghz speed of the 64 chip itself act as a limiting factor or should I just consider total system performance (better than 3.2ghz)?