Looks pretty good so far, but I'd like to stress a few things:
First off, you don't have all the necessary parts. You need a motherboard, and if you plan on doing any gaming (besides minesweeper, solitaire, etc) you need a video card. If you don't plan on doing high-end gaming, you need to find a motherboard with integrated graphics.
Second, I think it would be well worth the extra $10 or so to get the Athlon 64 3800+. But a 3700+ will get you by if you don't have the $10; but I'd definitely say to go for it if you can.
Third, I'd invest in a little better of a power supply. Looks like a lot of good reviews, but it's only 430 watts. You may need more than that; it would be good to have around 500.
And fourth, if
you can, I'd get DDR 400 (PC3200) RAM instead of DDR 333 (PC2700). If you're not going to be using this for gaming though, you can stick with the cheaper DDR 333 RAM. Maybe some DDR 400 Corsair ValueSelect
or something like that would be good.
And no, I'm not trying to criticize every part you have on there
, I'm just saying what I would get. Plus, the hard drive looks nice. The better RAM and processor aren't completely necessary, but will help out a little. But the PSU, I'd definitely upgrade that. Ask some others for suggestions, I'm not good at finding good cheap reliable PSUs. And just remember that you need a motherboard and a video card too.
Good luck with your build when you decide to do so.