Looks good to me but why a:
AMD Athlon XP 2800+
I would just get a 2500+ and overclock that bad boy to 3200+ plus speeds. Good enough. And half the price. But choice is yours.
And yea you are missing ram and a hard drive. Sure you know that. :P
Get some ddr400, at least 512mb of it ( i would get two stick of 512mb myself and run dual channel, like i am now.

) and at least a 80mb 8mb cache hard drive 7500rpm or 10000 rpm of course.
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