May I suggest helping out the local animal shelters who due the economy are over run with family pets that are being turned in? They really need food and supplies right now. ( and when you donate to the food banks, remember to donate pet food too. )
Find a local meals on wheels delivery person and see if anyone on their route has pets. Pets are so important for seniors, especially if they live alone. Some seniors only get one a meal a day, the one they get from meals on wheels, and they will share that meal in order to feed their pet! Perhaps you could send pet food to that person?
Or give some money to your local veterinarian and tell them the next time someone comes in with an injured pet and they don't have the money to treat it, to use that money. Can you imagine what a gift that would be?!
I've got a million ideas for you if you need help spending it.