No, not yet, I dont know what the full list of killstreaks is yet so can`t comment. I wont bother with the 25 killstreak option though. Little or no chance of ever getting there. Might go for a 3, 7 and 10 for starters. What about you?
Modern Warfare 2 | Multiplayer | Killstreaks and Deathstreaks
This has them all, no real spoiler as i PMed you the big one