Just saw this. Unlike the auto-trunk thing from a few months back, this one is plug and play -- no wire tapping or other invasive work. It obviously requires some mechanical skill, but seems far more straightforward than the other one. $500 on the site. The install video I posted below has a 5% discount code, FYI. I doubt I'll rush out to get it, but does seem like something I might want down the road (pun intended).