How many times can you fold a piece of paper until it's no longer physically possible? Arguably 7. The Mythbusters achieved more but regardless, the point is it's finite. So it seems with the multitude of derivations on the Bejeweled theme. How many more can the iPhone sustain before the game concept implodes upon itself and winks out of existence?
Apparently at least 1 more because Quadrum:colors from Kirill Bulatsev of iChromo hits the right buttons.