Keep in mind that some aftermarket TIMs require a curing time, which means their initial performance might be pretty bad, but after a few days of use or a few hours of burn in, they might get better. The stock TIM might be made available on our store for people to re-seat their CPUs. We'd definitely like to make it available to you guys.
My idea is to have square-cut pads of the stuff that can be applied consistently - this way people could re-seat their heatsinks with the exact correct amount of TIM instead of gooping it on or going way too light. Also, it'd make benchmarking heatsinks more fair since you could always be sure you used the same amount of TIM between heatsinks.