Your motherboard you selected is an AM2 AMD board. You'll want a LGA775 one, preferably the P35 chipset. This one would be *MUCH* better for you:
Newegg.com - GIGABYTE GA-P35-DS3L LGA 775 Intel P35 ATX Intel Motherboard - Retail
I also suggest Crucial Ballistix for your RAM instead:
Newegg.com - Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
Get an 8800GT instead of the 8800GTS. It's better and cheaper.
Then you'll still need to get a Power Supply.