At Chesapeake it was a bunch of older stuff, not my cup of tea. I cant believe they played Bull**** though. I found that amazing to hear.
But at Philly there was enough techno to keep me happy. Some of the tracks I recognized a bassline from the song in the pits and would go out front and figure out what it was. Some of the ones I recognized was,
Darude - Sandstorm (of course...)
Alice Deejay - Back in my Life
Ferry Corsten - Punk (this surprised me, on of my favorites, but a little to hard for most people. Good timing with it to, during one of our matches when I was working the arm)
Armin vanBuuren - Rapture (no sure what mix, also have seen "Lio" as artist on this one)
Thats all I can remember as far as techno
But some of the other ones...
Vengaboys - We Like to Party
Vengaboys - Boom Boom Boom Boom ( I can't believe they played this one... its absolutely filthy ... absolutely great beat though, so who cares...

)
I think I also heard Aqua - Barbie girl