Surprised and happy to see one of our videos has been the top download on iTunesU (that's the university part of iTunes).
We don't put many of our periodicvideos onto iTunes because it has always seemed a lot of extra work for only a handful of viewers.
But if people are starting taking an interest, that'll encourage us to pop them on more regularly.
PERIODIC TABLE OF VIDEOS ON iTUNES
SIXTY SYMBOLS ON iTUNES
(Our thanks to Andrew Burden at the university who helps out with iTunes stuff).
For the record, it was this video about Crude Oil that has been most downloaded.