Talk about cool! At photostamps.com you can upload a photo and they’ll create authentic USPS stamps for you to use. They’re a bit expensive — a sheet of twenty 39¢ stamps runs $17.99 — but I can definitely see doing this for wedding invitations or some other important event.
Note: Until March 15th, 2007 you can enter promo code “2007” and get free shipping. They sell NFL and college stamps, too, so now you can celebrate the Florida Gators National Championship by affixing a UF stamp to every letter you send!
2024-01-20: Broken links in this post have been removed and/or updated.