It's not like Tony Iommi himself called and begged. Through a friend in work I did get to submit this as a potential single cover for Black Sabbath's first single from their latest album. (They'd added a '?' to the song title by then - "God Is Dead?")
The usual set of conditions - told about it on the Friday, due by the Monday. Not like I really thought it would get chosen - it all looks a little too punk rock - but nice enough to know maybe the boys at least got to look over something of mine.