You can find Afterlife on the guild list in-game.
I (Archy) had a lot of fun playing the Devilian Beta last weekend and Trion is now having a second closed beta weekend this weekend, 10/29 through 11/01. The game would be even more fun with friends to play with! Come grab these free keys and join me.
Update: Guild created in the beta (US server) just look up Afterlife on the guild recruitment board.