If you have more or different info, please forward it along!!

Speedo:
Speedo uses (obviously) a Gibson Les Paul Custom guitar, but he gets the sound he wants out of his guitar by using active pickups. He uses EMGs, I think only in the bridge position. He uses a Marshall JCM 800 Head run through a Mesa/Boogie 4x12 cabinet which has been modified by taking the front grill off.

ND:
ND plays Gibson Les Paul Custom ('79) and uses standard gibson LP pickups. He may use some different ones in the bridge position also. It looks like they are ones from a Fender Strat. One of my crafty minions reports that he has two of them right next to each other. One is black and the other is probably white. They must be hooked up together, meaning they are both on at the same time. Another crafty minion spotted a Boss Dual Overdrive (pretty sure) on top of N.D.'s amp. He also uses a Marshall JCM 800 Head run through a Mesa/Boogie or Masrhall 4x12 cabinet which has been modified by taking the front grill off.

Petey X:
Petey X plays an Ibenez bass and a black Fender American Standard bass (or Standard Jazz bass), and I think he has an Ampeg cabine with a Gallien Kruger head. The cabinet has a big Rocket logo painted on the front of it so its way better anything out there on the market.

Ruby Mars:
Ruby Mars uses drums. Those electronic ones like the Def Leopard guy used to use.

JC 2000:
Uh, he has a trumpet... I have seen both silver and brass colored versions.

Apollo Nine:
Uh, he has a saxophone. He plays both Tenor and Baritone.