[Jack Simth]

Oh, Soulknives can be disarmed; it just doesn't stick for long, so usually only prevents the Soulknife from taking AoO's for the remainder of the round

Two disarmers/sunderers, however, can mostly shut down a Soulknife - one starts it off by disarming/sundering the sould blade, the other readies an action for when the Soulknife draws again - to sunder/disarm it. If the Soulknife steps out of range to draw, well, he's out of range, and can't attack the pair of Fighters/Warriors that round more than once (until the Soulknife reaches the point where the blade can be thrown multiple times in one round - 17th, and reach weapons combined with Spiked armor and Combat Reflexes take care of that little issue - each throw is a ranged weapon useage, and provokes....); step up and repeat. If the Soulknife moves out of range without via Withdrawl, ditto (charge + Disarm/Sunder, rather than step, of course). If the Soulknife moves normally, the Soulknife incurrs two attacks of opportunity from those shutting him down. Meanwhile, one of the two working on him can whale away with relative impunity (other than using the first iterative attack to sunder/disarm, of course, if the knife is drawn and currently unsundered due to one of the above circumstances) while the other maintains a readied action to deal with the blade as soon as it arrives.

But that's a specialty tactic, and those two aren't doing much else in the interum....