dell 2200 for as low as $350 with wireless card!
http://configure.us.dell.com/dellstore/config.aspx?cs=19&kc=111&oc=d81105a&x=0&y=0
Base config is $540, but drop the expensive features, especially the worthless software bundle for $99, and you can get it as low as $335.
I know a couple of you have been hunting computers lately, definitely worth a look.
You can add RAM later for far cheaper than they charge you.