…But in the meantime this is better than having to be explicitly invited by an existing player. If you’d like to try Tabula Rasa, you (yes, you) may now do so for three days for free by going to Eurogamer and creating an account. You’d probably better hurry, though.
EDIT: Wynne pointed out that the above link is probably Europe-specific. If you’re a NorteAmericano, you’re going to want to go to MMORPG.COM instead. Thanks, Wynne!