A brilliant idea some friends of mine had when they got married was put up a website for people to donate whatever amount they wanted towards a specific thing; whether it be a traditional 'gift', or a pack of gum...
i.e., along with registering at a couple of stores, for their honeymoon they took a roadtrip up the West Coast, so you could donate $50 towards a night at a hotel, or $15 towards breakfast, or $5 towards a rest stop, which would include "a soft drink, a candy bar and a pack of gum" - then they took pictures at each place where people donated, and the individual who donated would get the photo with a thank you. Really creative, and took everyone of all income levels into consideration.