I'm tempted - the weekend time investment is something I could do (dependant on where in the world you are, of course - my clock is GMT, well, BST for the next week or so). Not sure if the word 'sensible' applies, however.
I'm likely to be too inept and inexperienced at MMOs for your purposes, though. I've played WoW a wee bit, but have always been a solo-player. I'd possibly be a liability.