There are a couple of fantasy football fanposts on the page right now and I'm sure more will pop up over the coming few weeks, so the idea here is to have one post for all things FF, and to have it bumped back to the main page whenever it falls off (assuming that's okay with the mods, of course).
The game of choice is the Official Premier League one and EstoBlue has already set up a classic and a head-to-head league, his original fanpost is here and contains everything you need to know in order to join.
That covers everything, I think. Normally a post like this would end with some light shit-talking and challenge-issuing but honestly, I'll have stopped paying attention after about a month.
That might be a good selling point actually - join the WAGNH fantasy league, you're guaranteed not to come last!