I'll add a few clarifications to what Spot had written, in form of FAQ:

Q: How can I take part in Random Rookie?
A: Join #fumbblminors and find 7 more coaches willing to play.

Q: How we assign races?
A: One person in main chat (#fumbbl) ask Thebot 8 times with command bb ranked race. Then we assign it according to counting so player, who said "1" gets race, which was drawed first.

Q: I have a race, what should I do?
A: Like normal, build a *ranked* team and (when smack admin asks you) apply (like normal) for a SMACK, here: http://fumbbl.com/FUMBBL.php?page=group&op=view&group=1609

Q: Is there any difference between normal rookie smack and rr, except randomizing races?
A: No.

Q: Why it's so good? Why you play it?
A: Cause we are bored with normal rookie smack with thousands of dorfs,cd,ud,zons,orcs.