There are a few new custom kernels available now for the Droid Incredible that will enable multi-touch. If you are into gaming and emulators, multi-touch can be enabled to allow 2-5 simultaneous presses.
My current favorite is chad0989’s Incredikernel. You can also try HeyItsLou’s version or invisiblek’s version. Just keep in mind that some are for Sense roms and some are for AOSP based roms. They’re all in the update.zip format for easy flashing, just clear cache beforehand in your recovery and you are good to go.