it's pretty much as the thread title suggests

I've seen:

Iron Maiden (x4)
B L A Z E (x3)
DragonForce (x3)
Judas Priest (x3)
The Darkness (x2)
Scorpions (x2)
Trivium (x2)
Area 54
Def Leppard
DesolatioN
Diamond Head
Edguy
Evanescence
Fourway Kill
Funeral for a Friend
Heavenly
Megadeth
Metallica
Orange Goblin
Raging Speedhorn
Randy
Reactor
The Renegade Playboys
Ricky Warwick
Stone Sour

and next year, I'll be adding the following to my list:

Marillion
Genesis

and probably a few more

Ant x