I'm sticking with my current system until something either reliable or a lot faster comes out. I'm not really interested in things that either crank out to much heat, or is a technology that is pretty much useless and its socket type will be unsupoorted by the time the technology even really begins to get more support.
As great as it would be to have 64 bit CPU's, they don't do much good right now. Great, you can get a couple of 64 bit OS's that are still fairly new. Most of the drivers for the 64bit XP are in Beta if not Alpha stage if they are even available. Only other realy choice is the 64bit SuSe. Thats a whole new slew of potential problems.
SO you pretty much are stuck with 32 bit for the time being, even with a 64 bit CPU. Which sucks when you consider that the 64bit CPU costs 2-3 times as much as an equivalent 32bit CPU and while effectively speaking, they do the same thing.
I plan on waiting for either AMD to come out with their Dual core CPU's or at the very least figure out exactly what they are going to do with their chips. Looking at their price mappings for 2005 does not fill me with wonderful visions of owning an AMD again anytime soon.