Some things I've figured out:
- If you need a secondary fermentation, it can be done in kegs. I do it all the time now.
- You can affix an airlock to the port where the pressure release valve screws in. Just get some vinyl tubing cut off about a half inch. Push your airlock into it then "screw" it in. Not sure of the exact hose size. (need to add a picture)
- Primary fermentation in kegs. The head space isn't large enough to allow room for the krausen. Some drops can be added to the wort to decrease the foaming.
http://cruisenews.net/brewing/kegging/page1.php (secondary fermentation)
http://cruisenews.net/brewing/index.php (main page)
Bodensatz Brewing's: Soda kegs for fermenter (primary, secondary and serving)
Real Beer Forums Thread: Cornelius as a Primary
things I'm just not sure about
http://www.midwestsupplies.com/products/ProdByID.aspx?ProdID=6120 (soda keg conversion kit)
Basic Brewing Podcast with some corny kegs fermenting info. Link courtesy of Brian. Podcast courtesy of Basic Brewing.
Looking for kegs. From time to time you can find some at Amazon
If you are looking for books about home brewing...