1337 n00beh, will this be the first water cooling saetup you have had? If it is, I advise against building your own. You should get a kit for your first one, and then when you know what you are doing build your own. A good starter one is the Thermaltake Aquarius 3. Dangerden also has kits, give one of them a go. But if this is your first water cooling system, I wouldnt advise you to build it yourself.
Also, you can get pumps that plug either into your mother board via a fan controller, directly to the psu via a molex connector, or you can get one to plug straight into your hosue outlet.