Campus Progress contributor Matt Singer had some interesting thoughts on youth voter mobilization at the youth progressive organizing panel at Yearly Kos just now. "We gotta be cool again," said Matt. Although I doubt politics was ever very cool, I agree that it is important to try as best you can. Matt pointed to things like one-pagers that look like concert fliers as ways of appealing to young people. 
Matt also noted the importance of breaking out of issue silos and of recognizing that traditional four-year college students actually constitute a minority of college-age youth. "We have to pay attention to non-college students and non-traditional students," Matt said.