Ah, EQ Pedals are probably the most versatile pedals out there. I've got a Boss GE-7 (active, 7 band) and love to play with it. Usually I use it to just tweak my tone slightly, or on occassion to scoop mids

But lately I've put it in front of my amp (rather than in the effects loop) as a sort of "underdrive" pedal. I turn the gain on my amp pretty high, and on the pedal cut the low frequencies and bring the level down a bit. Gives a pretty cool sound.
All you know about me is what I've sold you,
I sold out long before you ever even heard my name.
I sold my soul to make a record,
and then you bought one!
Cool, I've never tried one, but I plan one getting one eventually as part of my new complete rig overhaul.