Copperhead posted some good components, but the list doesnt include cd/dvd drive, keyboard, mouse, monitor, speakers.
here is a list i came up with, i went with intel's core duo, which is FAR better than the amd option listed however, if you are REALLY crunched for money then AMD is not a bad option at all.
here is the list:
INTEL CORE 2 DUO E6300 208
ASUS P5B LGA 775 MOBO 160
OCZ POWERSTREAM 520 WATTS 110
OCZ 1 GB (2X512 MB) RAM 110
EVGA 7600GT 256 MB 140
WESTERN DIGITAL 160 GB SATAII 67
COOLER MASTER ATX MIDTOWER 35
SONY 16X DVD COMBO DRIVE 54
VIEWSONIC 20" WIDESCREEN LCD MONITOR 310
LOGITECH 4 BUTTON USB MOUSE 16
LOGITECH MEDIA KEYBOARD 16
LOGITECH 2.1 32 WATT SPEAKER SYSTEM 33
this may cost more than the other system, but the performance leap is much greater than the dollar difference.
some things that i didnt include are:
a sound card, because you can use the onboard audio (which is better than most people think).
an operating system, this is up to you, whether you want windows XP home, proffessional...i say get windows xp pro it doesnt cost so much more and its a little better.
the video card i selected isnt the best one out there, the reason why i did that is because all the video cards on the market will become obsolete when a directX10 is released, if you look at the specs of any video card you'll notice it says driectX9, so while we all wait for the new cards to be released you can easily get your work done with the 7600gt.
the system i configured ony has 1 gb of ram, but its running ind dual channel mode, the reason why i did this is because its the cheapest option, and if you ever feel that your system is running a little slow, you can easily upgrade to 2 gb of ram.
the monitor i selected is supremely kick-ass and you'll have fun with it for years.
i have the higher model of that power supply and you wont be dissappointed with that.
if you can spend these extra couple of hundred dollars, you will be thankful later on.