Cataclysm leveling.

[ChildeRoland]

When cata hits, I'm either gonna level my hunter or death knight, or make a completely new Goblin Warlock. Can any beta-testers out there tell me which lock-spec is the best for leveling in the Cataclysm Beta right now? I tried out demo and affli on a 29 lock on the PTR, but I didn't find any of the specs quite entertaining, except for FG's Bladestorm. So what is the best leveling spec for cata?

If you post a explained guide (which talents to pick each level) I'd be extremely happy =)

Thanks and hugs in advance, ~ChildeRoland

Edit: cleared out a small thing.