Well... You could probably run a pair of sound cards and do this. Or perhaps some of these USB headsets. I've never used them, but they have to work independently of your sound card... The real problem is dividing up which program uses which card. I know in the control pannel, you can select which records and what not, but I'm not totally sure if you can do the same between programs.
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Desktop * Athlon X2 4200 | 2G RAM | 160G HD | 7600GT
Laptop1 * C2D T5550 | 3G RAM | 120G HD | Intel x3100
Laptop2 * C2D T5250 | 2G RAM | 160G HD | Intel x3100
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