Call of Duty XP was announced today. Go check out the full article below this one.
So I was reading 402's twitter feed and found some news,

" Its okay. I forgive you. Still working on it, will be capturing a lot of new footage tomorrow and editing more."
So we should be getting some gameplay from Spec Ops soon!

" We changed the entire way the killstreak system works. I can't go into detail yet, but I will share when I can."
New killstreak system, I have no idea what it could be.

" I agree and we have put a lot of focus on making sure to reward the guys contributing to the objective even without getting kills."
So some sort of rewards for players who play the objective, capture flags, return flags in CTF, plant the bomb, etc.

So there you have it. Not much, but just some things 402 posted on twitter and we can see what they are doing to MW3.