I just came across this site today. I think it's something more people should do. The tradition of the "white envelope" is simple but incredibly powerful. In lieu of a material gift at any occasion, do something for someone else in honor of the recipient. Write up what you did, put it in a white envelope, and give it to the recipient as their gift.
This would make a great gift but I think many craftsters out there could make the envelope if they so choose to do so, out certain types of paper or make something to hold the envelope on if they don't have a tree. Just thought I'd share this.