This game looks AWESOME to say the least, after reading about the multiplayer it may be time for me to retire MW2 for a while. Apparently you gain 2 types of points in this game : XP as normal when you are levelling up for unlocks and also CP which are points you acquire which can be gambled and used to unlock things manually earlier than you would get them just the normal way of getting XP. This should take the competitive side of the series that everyone seems to enjoy to a new level. The new weapons and killstreaks look like they could make things interesting to including as tomahawk that forfeits all the CP if you get hit with it as a humiliation.
Treyarch may have missed the mark with WaW , but this definitely looks like a promising title and i will definitely pick this game up at the midnight launch
Here is a link to an article on the game from gamespot : Call of Duty Black Ops