You do need a special wrench to remove them, but you'll eventually need the wrench to service them anyway. Eventually you'll get a leak.
If you make it down south, Mountain Beverage Supply has had a bunch of kegs for sale pretty cheap. They are just north of Fountain IIRC. I bought about a dozen.
They are handy for more than kegging the end product. I leave my beer in a primary (V-Vessel) fermenter for no more than a week then drain that into a keg for secondary fermentation after drawing off the bottom stuff. Then about 6 weeks later after secondary fermentation is complete I transfer the finished product from one keg to another through a 1 micron filter to clarify the beer. When I'm done kegging I use another empty keg to force sanitizer and fresh water through my gear for cleanup.
Once you have a few kegs you'll want a bunch of different lines and fittings + a spare CO2 tank and regulator to configure them for different tasks. The kegs can make the whole brewing process much quicker and easier.
Last edited by frontrange; 08-13-2010 at 12:59 PM.