I ended up finding myself with enough time for a quick extract brew tonight, so I brewed something I've been wanting to experiment with for a while. I brewed my usual extract IPA recipe, but with the only hop addition being a huge whirlpool addition (8oz in 2.25 gallons) at 120F for one hour.
Theoretically, there should be virtually no isomerization of alpha-acids at that temp. It will be interesting to see how much perceived bitterness there will be. I do plan on sending a sample out for analysis to see what the measured IBU level is as well. Stay tuned.