I recently noticed in Black Ops that Jammers are the bee's knees for flushing out campers. If you can't reach a claymore with a flashbang, then just set a jammer somewhere close.
I noticed though that I didn't get shot by a Cobra while in the radius of my Jammer(and I didn't have Ghost Pro). So does the Jammer disable ALL enemy equipment including kill streaks? Also, does it disable RC-XDs?