And don't forget that you can play the markets. Vircurex has more trade options (Altcoins for Altcoins) while MCXnow only offers Altcoins for Bitcoins.
So you can buy altcoins, and if you look at the Vircurex markets, sometimes you can find a loophole where you can buy the altcoin for cheap on MCXnow, then use the altcoin to get cheap DVC on Vircurex. Then take those Devcoin back to MCXnow to make a profit. You really have to pay attention to ALL of the devcoin markets at once to do that though.