The following is a list of links to kegging resources on the internet. I'll continually add to this list as I find more resources. If you know of others please post a comment here with a link. If you are interested to see what other resource pages I have created click on the "resource posts" label link at the bottom of this post or over there in the sidebar.
Check your local homebrew store for supplies. You can also find equipment on Amazon...
Alternative Brewing's Kegging Page (Cornelius Kegs)
Brew Your Own's reader's question on cask conditioning your homebrew