It is not nebulous or ill-defined at all, it is quite plainly spelled out in the narcotics laws of your local jurisdiction, which are by definition the local standards for materials that impose a higher perceived cost than benefit. If none of this makes sense to you, try Tierra del Fuego, I hear you can set up your anarchy there for little cost.
Well, I ordered my dual 2Ghz G5 back in July. Went all out with the 23" Cinema Display, the Logitech Z-680's, the whole works. Didn't order memory from Apple since it's a bit cheaper to get it from Crucial.
I've never been canoeing before, but I imagine there must be just a few simple heuristics you have to remember... Yes, don't fall out, and don't hit rocks.