Arnies is a great brewery, and I really like the people there. I live right down the street from their brewery.
You used to be able to buy hops and grain from these guys in bulk.
I'm not sure if they still do that, though.
Oh, and getting the divine reserve is a bit of a trick. No one stocks it on the shelves. You basically have to ask the guys at St. Arnolds who they recently shipped to, call that store, ask them to hold some for you, and then ask someone to get it for you out of the back when you get there. I've paid upwards of $10 for a six pack.
Also, their winter stout is excellent, and I like their xmas ale too. However, make sure you check how strong it is prior to drinking. I think the Xmas was like 7.5% ABV one year.