Wow, that is a nice looking tank. I'm pretty well versed in the ways of the fiber-glass myself and I have been thinking for months about making a tank. You have inspired me! Maybe I will get my other project out of the way and work on it next week.
Sojudave and Cookie, A guy named Layem'low did exactly that and it looks awesome, check it out.
I think of that every time I see one of those kegs. I work part time for a beverage company so I see them a lot, lol.