Contributing Computer Help To Non-Profits?

Chris Hedberg asks: "I have a friend who works for a non-profit organization whose purpose makes them a potential target for hacking. Unfortunately, although they're a significant group, they're run by a very small group on a shoestring budget and a lot of coffee. My question: Do groups exist who will contribute time or even just advice to nonprofits who cannot afford a formal I.T. team to secure their site? Seems likely that such must exist, but I'm not quite sure where to look. Sites for low-level novices looking to do it themselves would also be helpful."