I don't know, I'm already playing here:
http://www.fantasy-liga.com
I prefer it to the yahoo one, there's a bunch of extra features and I remember last year on Yahoo we had to beg the staff to fix mistakes. :angry:
I think it will be more evenly distributed this year, mainly because I think Neymar and Messi will split the goals, and also because Neymar's presence will create more room for midfielders to use his assists.