Serpent - that's cool. Unfortunately I don't have a Fry's anywhere near me (living in the Saint Louis are), so online deals are the only ones I have available to me. *Sigh*
SickBeast - I generally agree there, though I'd leave 939 out of the equation. Since 939 uses DDR (not DDR2) and there are very few 939 CPUs left out there, you don't have many easy upgrade options. The first means that you can't just upgrade your MB and CPU, without getting different RAM (except in the special case of using some ASRock MBs that allow DDR and Core 2s). The second means that there aren't many options for just upgrading your CPU. If you've got an old single-core, you can pick up a cheap, low-end dual core, but that's about it for the 939 upgrades out there. Unless you can find someone selling off faster 939 dual-cores on FS/FT. If you're like me (754) or have a 939 of any speed at all, then you're looking at an entirely new platform anyway. But you're right, that anyone with an AM2 platform is likely better off just getting a better CPU and/or overclocking.
I've been tempted to just get a MB that allows me to use my current fast DDR, but DDR2 prices are so cheap right now that if I upgrade at all, I'll get new RAM.