I am going out on a limb here when I ask for this.

[Ninti the Mad]

Does anyone know is there are groups out there that resemble blues but mixed with heavy rock/metal?

I like how Zepellin mix blues with rock and I was watching Metalocalypse (awesome show) where they play a bluesy type song and it sounded really good.

I really hope there is and, if there is, its actually good.

[El Vaquero de Infierno]

Down
Corrosion of Conformity

[Buzzkill]

The Black Keys

Pretty much exactly what you are looking for

[ct2k]

Pretty much the entire sub-genres of Stoner-rock and sludge take heavily from bluesy influences

Also, Sabbath

[Champion of Europa]

Some Rollins Band stuff.