Well, fresh on the heels of the killstreak list, we've got another claim to the multiplayer perk set. You know the drill, rumor, not official, spoiler alert.
This comes from the site MW2blog.com, which though it might look official (it even cites "Copyright Modern Warfare 2"), is registered through GoDaddy to someone in the U.K. I'm not saying these are false, just saying it's not official. And via Twitter, the Infinity Ward community manager Robert Bowling says: "Can't confirm nor deny any leaks for #MW2. Official stance is to just wait and discover the awesome yourself on November 10th."
Marathon (Tier 1)
Standard: Unlimited Sprint
Pro: Get over obstacles fasterSleight of Hand (Tier 1)
Standard: Faster reload
Pro: Aim down sights fasterScavenger (Tier 1)
Standard: Retrieve ammo from dead bodiesBling (Tier 1)
Standard: Dual attachments on primary weapon
Pro: Dual attachments on secondary weaponOne Man Army (Tier 1)
Standard: Use primary weapon in secondary slotStopping Power (Tier 2)
Standard: Increased bullet damage
Pro: Increased bullet damage to vehiclesLightweight (Tier 2)
Standard: Move fasterHardline (Tier 2)
Standard: Killstreaks rewards require 1 less kill
Pro: Deathstreaks require 1 less deathCold Blooded (Tier 2)
Standard: Undetectable by UAV, air support, sentries, and thermalDanger Close (Tier 2)
Standard: Increases explosive weapons damageCommando (Tier 3)
Standard: Increased melee distanceIncreased melee speed Steady Aim (Tier 3)
Standard: Increased hip-fire accuracyScrambler (Tier 3)
Standard: Jams enemy radarNinja (Tier 3)
Standard: Invisible to heartbeat sensors
Pro: Move silentlySitRep (Tier 3)
Standard: Insertions. Reveals enemy explosives and Tactical InsertionsLast Stand (Tier 3)
Standard: Survive after being killed for 10 second, pistol equipt. You can crawl too
Modern Warfare 2 Multiplayer Perks [MW2blog.com]