Linux is going to be number one, once I pick a distribution. I don't plan to dual boot, at least not right away anyhow. Although it is a possibility because the people at PC World were at least nice enough to provide me with OEM copies of Word 02 and XP.
I don't plan to game, at least not with modern stuff (I do spend a lot of hours on
www.the-underdogs.org though).
I am seeing the upgrade kit as a good starting point, but as I won't be buying for another couple of months my options of motherboards that support Sempron should be wider by then, and everything a lot nicer.
A loud fan would be a problem, so I may have to look into that, depends how quiet I can get a full size PC to work.
I still have the thought of building a fanless PC in the back of my head, but am not sure if I can live with only 533mhz (or 800mhz with a lil' fan).
Cheers, gang.