Wow, I just noticed that The Nonviolent Peaceforce is selling Peacebonds. These are a lot like the other charitable "alternative gifts" from the likes of Oxfam, for people who don't want to give yet more material junk at christmas etc. Generally they're a great idea, I think, but Peacebonds particularly catch my interest.
Well, I'd better not put words in their mouth. Go read their own site for more details — you'll be glad you did :)