Aren't you getting about $30/day now?
Are you overclocking in the main control panel or with another tool?
According to whattomine, around $40 w/ the overclock, but that won't last. Also I'm not sure that I actually am, the antpool doesn't seem to record earnings the way they say they do. It's really rather sketchy, I don't trust their pools at all, and I'm eager to jump to another when I can figure out what's not working...
EDIT: and just with the main panel. The only antminer I know of that doesn't have at least SOME control over oc is the B3.