Join with low time commitment?

I'm interested in helping out with MAYDAY.US, as I agree that campaign finance reform is a key to a well-functioning government, but as a PhD student I have very limited time to help out. I wouldn't want to sign up as a volunteer but then have to bail because I can't give enough of my time. Would it still be valuable for me to join even if I can only give a limited amount of time (say, no more than an hour or two a week, and/or maybe a bigger event as much as once a month)?

If it helps, I'm in the Boston area, and I have programming skills (my PhD will be in computer science).