Your very own whatever on a stamp

For a surcharge, stamps.com, authorized by the USPS as a purveyor, using an image that the customer supplies, will create custom postage. As the site announces, "All imges subject to approval. Copyrighted images may not be used. Pornographic or other inappropriate images will not be accepted. Individual images must be smaller than 5 MB." The list of restrictions is extensive. According to news coverage of this service, stamps.com assigns personnel to review images for suitability. Wags at the Smoking Gun, among others, have challenged people to outwit the censors, with some success.