Clearly not remembering that microphone-based blowing games on the DS went out the window with Feel the Magic, Red Octane has shown off new screens for Guitar Hero: On Tour, which demonstrates the blowing game mechanic.
The game looks good, except for the dodgy looking text that we imagine is only using a placeholder font or comes off better when animated.
However, we really can't imagine that the few remaining souls who would have strapped the peripheral to their DS during their daily commute are now going to bother if they have to spit all over their screen in front of their travelling peers.
There's a lot of debate in the office about where people most play their DS though (current thoughts are mainly at home), so it shouldn't affect the sales. Too much.