Tons of new info from leaked beta videos and live streams

There's just too much stuff to list, i recommend searching youtube for the most recent uploads with "black ops beta gameplay" in the title and check it out for yourself, more and more things are getting revealed each video.

Second Chance lasts 10 seconds and you can crawl around during it.

You get 1000CP for hitting level 2. It went up to 2500CP for hitting level 4.

Ballistic Knife isn't purchasable until level 15.

Crossbow isn't purchasable until level 33.

Assault Rifle Unlock Levels

M14- Level 9
FAMAS- Level 14

Grenade Launcher Costs 3000CP! (rofl)