Cats, in marked (and blessed) contrast to bears and resto, aren't changing a lot in patch 4.0.1 (barring a lingering DPS issue I'll talk about later), and the column I published earlier on the beta cat is still largely accurate if you want an ability-by-ability rundown on specific skills.
Posts with tag cat-dps-on-cataclysm-beta
My main is now 85 on the beta, and I've parked her at a training dummy from time to time to see what cat DPS looks like. Truthfully, I'm not sure that the resulting information is worth a damn, but it is representative of what you'll be seeing on a beta cat at the moment in questing gear.
Of the three specs we cover in the Tuesday column, cats have changed least, which I think is all to the good. Cats are emerging from Wrath in the best place we've ever been, with an interesting rotation and high damage potential subject to player skill and fight conditions. Blizzard seems to have concerned itself mostly with not changing what ain't broke and has instead moved to address some of the factors that have historically crippled cat DPS unfairly.