I signed up for it. I figure I'll play for another year, though Hubby has pretty much quit playing WoW, and reading about the new changes and what's coming with the next expansion has just about clinched it completely, but he has talked about trying Diablo III. So, it works out for us that way. We get the beta, and, if he likes it, we'll get the CE and I get 4 months of the WoW contract paid for.
A friend I talked with last night was under the impression that the 1 year contract had to be paid for in advance all at once, lol. That I wouldn't have done, lol.