Black Ops is now a week away, so I thought I would provide you with some multiplayer info. This is 100% true, I've gathered this info from people who have played the beta (J-Tag 360 ;D). I am personally getting B. Ops for the PS3 and possibly the Wii.
Lightweight pro: No fall damage
Scavenger pro: Start with extra mags. Replenish lethal grenades.
Ghost pro: Undetectable by aircraft, dogs, IR and sentries. No red crosshair or name when targeted.
Flak Jaket pro: Immune to fire and always allows you to safely toss back grenades.
Hardline pro: Change the contents of a care package.
Hardened pro: Bullets do extra damage to aircraft and turrets. Reduced flinch when you are shot. Reduced flinch? LOLWUT.
Scout pro: Faster weapon swapping.
Steady Aim pro: Quicker aiming after sprinting and quicker recovery from knife lunge. Because panic knifing isn't already overpowered and can't lunge through bullets.
Sleight of Hand pro: Faster aiming down sight with non-scoped weapons.
Warlord pro: Start with one extra lethal and tactical grenade (except smoke).
Marathon pro: Unlimited sprint The lengthier sprint time for Extreme Condition was great.
Ninja pro: Louder enemies.
Second Chance pro: Survive longer and any team mate can revive you. Lol.
Hacker pro: Can sabotage enemy equipment, turrets and crates. Invisible to motion sensors.
Tactical mask pro: Reduces the effects of flash and concussion grenades. Reveals the locations of a flashed or stunned enemy.
Credit for the list goes to Thunder Toro. Sub him up.
For a more complete list of perks go here: Perks.
List of B. Ops weapons: Weapons
Here a low quality beta gameplay channel: YouTube - BlkOpsGamePlay's Channel
A higher quality channel got banned a few days ago for copyrights.