The streak is made even more impressive when you consider that the chart only tracks ringtones that are actually sold by various major vendors. Add in all the nerds who've undoubtedly downloaded a free version to their bluetooth sets and the classic theme is probably even more ubiquitous.
Personally, I'm cheap and lazy enough to actually use the built in ringtones on my phone, but I'm always curious to see what other people use. Have any Joystiq readers actually downloaded the Mario theme to their phones? What other video game ringtones have made an impression on you?