100 hours of community service in college every year? That'd really sucks. It may not seem like a lot, but it is if they're spent on drudgery...
But I can't help but feel you aren't being creative enough or looking hard enough. I mean I'm sure homeless shelter's need volunteers, as do toy donations for under privileged children, political campaigns need volunteers (see Louie Mantia's contribution to the Obama campaign here: http://louiemantia.com/blog/?p=31), and so do Boys & Girls clubs.
Not to mention taking 1-2 weeks off and helping people in other countries.
However, I'm one of the lucky few here. :) I'll manage to get the community service hours by being a sysop for my school, i.e. managing the Ubuntu server that runs a significant part of the school technology infrastructure.
I also don't think its necessarily the best thing to do... perhaps he should give incentives to school districts that implement such a system but make the school districts responsible for it.
I think you're doomed to be repeatedly disappointed over the coming years as we all remember that government incompetence isn't some weird temporary anomaly, it's just the way things are.