I'm actually trying to get my kegging system figured out now too. I had a good start because some of my friends a few yrs older had a 2 guage regulator, 10lb co2 tank, faucet, hoses, and the fridge rigged up for commercial beer. I just need to find a corny keg and the disconnects (and replace the hoses).
With that said I have discovered (lucky for me) that the corny kegs aren't as expensive as say the faucet co2 tank or regulator. I have had my eye on, and have been reccomended to kegconnection.com.