Most user sites that are named after games are subject to take down notices, and can consist of spam, but cod7blackops.com seems to be one that most users will find useful, especially Call of Duty Black Ops fans.
They are a work in progress that aims to list all the COD Black Ops killstreaks and perks, as and when the information is made available. So far the details are limited, but it’s certainly worth a read with the list of perks and killstreaks increasing each week.
Zombies in Black Ops should make the games lastability longer than MW2, which lacked the popular mode. We have listed a video below that also shows some possible kill streak rewards.