I thought the jet-pack part of Dark Void was pretty cool, basically I like the rest of it also, the parts Ive played that is. I dont know why I stopped playing it though. I will probably continue on it later.
I didnt know about those other jetpack games.
But what Im really disappointed about is that there are no jetpacks to be bought IRL :P (and no flying cars either..its 2011 ffs!)
Ah, I just remembered another one, Rocket Ranger on the Amiga (lol): http://www.youtube.com/watch?feature=player_detailpage&v=F6vIHcxGyIA#t=247s
Then there is "Jetmen Revival", a 2D gravity-force-like game (for windows, at least I had it on XP, dont know about Vista/7). There is a pilot with a jetpack after crashing the ship, if that counts :P http://www.youtube.com/watch?v=qXTioPEQ3-o