This #IsCool. A new organization, The Extraordinaries, finds "Micro Volunteering" opportunities for you via the web or your iPhone. I have a BlackBerry, so the web is where I'll be. (I just discovered another simillar org, Catalista. Check them out here. They have an iPhone and Android application)
From their website:
Most of us don't have a Saturday to dedicate to a cause, but we do have
spare moments...lots of them. Despite busy schedules, we often find
ourselves with idle time: waiting for the metro, in line for a haircut,
at the doctor's office, bored at work, or when a friend is late to
dinner. What could we do in these moments?