According to this GamesRadar article, 10v10 play is definitely going to feature in FIFA 09. No goalies, basically.
David Rutter, line producer on the PS3 and 360 version said, “We’ve managed to get 10v10 this year online through strength of will and technological nous. [But] we want to make sure the control system for controlling goalkeepers is compelling enough before putting it in, because no game has done it particularly well, if it’s even been in there.
“So we want to make sure it’s good enough before putting it in because the last thing you want to do is say “tada – 11 v 11″… and the goal keepers are rubbish.”
More through the link.