Yes, I put some on my truck and they are great to have.
I tapped into the reverse light wire to kick the relay on. It isn't bad to do at all. It's nice that way because you don't have to think about it...they just light it up. I am still planning on running a second power wire with a switch so that I can turn them on seperatly. There are some times when having them on would be very handy other than just when the truck is in reverse.
There is at least one kit made...I am pretty sure KC Daylights makes it...but it just attaches to the receiver some how.
I welded two small taps to the receiver bar toward the outsides and mounted up a pair of fairly cheap wide beam fog lights...works like a champ.