My public facing SSH server gets 20-30k login attempts/day, mostly from Russian and South American IPs. It's the internet, just make sure you have a strong password :).
An SUV getting a 3 MPG boost is huge!
Consider for your 17-20 example.
300 mile trip:
300/17 = 17.65 gallons
300/20 = 15 gallons
2.65 gallons saved by going hybrid
Now for gasser that gets 35 MPG like a focus vs a 55 MPG Prius (which would be darn good for it...) gotta be comparable cars...
I'd rather they just put a torsion spring system like the trunks of most sedans have.
Extremely cheap to manufacture (certainly cheaper than a gas charged strut with all its seals and sliding parts), lightweight, and it never wears out.