Arken, don't worry about it... however, failing to have a Merchant god, what do you think about writing one up yourself If we lack one?
Arcady, I've got absolutley no problem with NPC classes. Couple things, if you were a DM with an NPC, I'd allow it to advance at least partially because of your work there at times. But, in order to advance as a normal adventurer, your going to need to find a DM for your shop adventures. An adventure might be as simple as crafting a masterwork sword for a fighter, etc.
So basically what I'm saying is, I'm fine with it, but I can't tell you how it will work till I get a little bit farther with the game.
I'm going to go open the Tavern now. Post may take a few moments to type up...