Blizzard just announced that they're planning on allowing players to buy game time with gold, as well as sell gametime for gold. Search google for "wow token".
As someone who has played the game for years (and used to sell gold for that time), I can honestly say that this will likely kill the goldselling market. As I mentioned in my post above, the investment you have to make with buying accounts and bot keys and expansions is high, especially if you want to make decent money. Plus, your accounts can be banned at any time for any reason.