I've just finished installing a keyless ignition module from Digital Guard Dawg. As part of the install, I made a custom ignition cover where I installed a push button to activate the bike (essentially the same as turning the key on, once the module sees the FOB). At the same time, I added another push button to manually turn on the fan. And while I was in there, added a relay for the running lights to take a little load off the whole thing.
I didn't follow the DGD's wiring guide, which would completely disable the key. I wanted the key to still operate as a backup. When I contacted DGD about wiring it in parallel to the key, they said yes, their police dept customers require this. They have plug-n-play wiring harness for a lot of bikes, but not the Venture, so I made my own as I did not want to cut any wires in case I ever decide to pull it out. The only thing I don't have with the keyless is ACC setting, which is ok because I can still do that with the key, if needed (which I rarely, if ever, use anyways).
Next project will be a keyless gas cap.