damn!! That sucks!! =X
I would be furious if that happened to me...
Anyhow, driving on a bent rim like that is never good.
Also your balance will be off causing your tire to wear off faster than the other tires as well as your ride comfort will be impacted at higher speed.
This happened to me long time ago when I used to drive Mitsubishi 3000GT VR4... it costed me nearly $600 to restore 2 stock wheels... I should've just purchased new ones... don't make the same mistake I did...
Good luck!