daphoenix has created a great guide that has taught me quite a bit about Elementalist play as well as giving a number of good builds that I've really enjoyed playing. If you're interested, it is available on the official GW2 forums here: Guild Wars 2 Forum - Elementalist - [Guide] Mastering the D/D ele 2/16/12
daphoenix has also been good about addressing changes made in the patches - check later posts to see his replies to others' questions, and feel free to ask your own!