This thread really is awesome. Here are some tunes that get me pumped when I walk or run...
The Ides of March - Silverstein
Faint - Linkin Park
99 Steps Closer - Linkin Park/Jay-Z
Psychosocial - Slipknot
Nymphetamine - Cradle of Filth
Wolf Among Lilacs - Medicated Kisses
Alive Again - Marianas Trench
It's Time to Dance - Panic! At the Disco
94 Hours & Elegy - As I Lay Dying
... and absolutely anything Coheed and Cambria!