The last time we saw two high profile figures engaged in an entertaining wager Microsoft's J Alllard had to sport N'Gai Croal-esque dreadlocks, and now Lyman is matching ZDnet columnist David Berlind's pledge to go bald if Zune is able to overtake Sansa in domestic sales.

ENGADGET: Pride, hair on the line for 2007 Zune holiday sales