The PC version of COD7 Black Ops will have dedicated server support, but the only way to host a dedicated server is by renting one from GameServers.com, as it's the exclusive provider for the game. The partnership will provide high-quality servers at an affordable rate and of course effective anti-cheating moderation. (not sure if it's true...)
Ranked Servers allow players to earn XP and CoD Points, Unranked Servers on the other hand don't, but they can be highly customized. Ranked Servers will cost $14.95 a month for an 18 player server and Unranked Servers will cost $0.99 a month per player. There are no setup fees and you can get discounts for a 3, 6 and 12 month prepay. (prices are not the right ones according to what bean's sayin)
anyways, we can suppose mods will come out very fast, that's what i hope and i m confident bout that, and all the kill streak i think won't be used in SD servers, so i think it can be a good fun to move to this game...