There's always a market out there for art.. ... but making money at it, that is good money, can take a while... I've gotten a few commissions since I've been here... all through contacts with or thru the guild, save for one. Paying gigs... but they haven't made enough money to earn a living by... There are a few around here who do make their living off of it... GamerPrinter for one, can speak better than I can about it. All you can do is hang your hat out there and see if anyone want's to what you got to sell... service or otherwise.
As for other map challenges, there aren't any for right now. But who knows what will happen in the future? But, As soon as we the CL's know... you all will be the first to know about it!