Just wondering seeing that Xbox gets their map packs early, so it should be a couple weeks after the ps3 owners get theirs.
Not even close. The maps packs aren't a monthly deal. I wouldn't expect them till April or May.
The Revolution DLC is still "new". It's been out less then 2 weeks.
It'll be mid-April to mid-May. Then it'll be late June early July followed by mid September.
Every 10 weeks basically.
New DLC's will come out inbetween 2 months or 2 1/2 months from the previous DLC, if it was any longer the last DLC would be due to come out in November, which assuming the next COD will be out then they will not release it then, averaging 2 months for a DLC is your best bet.