Last concert... uh... Opeth/Devildriver/Moonspell back in January. Damn thats a long time ago.
Next concert... I will probably see Fantomas and Melt Banana this month.
Then next month:
Eistuerzende Neubaten
Slipknot/Fear Factory/Chimaira
Iced Earth/Children Of Bodom/Evergrey
Machine Head/Arch Enemy/God Forbid (Eh.. maybe.. depends how I'm doing on money)
In the future...
Dave Chapelle (June MAYBE.. dunno, someone mentioned it here so I'm thinking about it)
Ozzfest (July)
Nightwish (September)