I think many readers will enjoy browsing the 2007 Graceful Envelope Contest site. The contest is an annual event hosted by the National Association of Letter Carriers and administered by the Washington Calligraphers Guild. This year artists were asked to design an envelope with a culinary theme. You will find a Gallery of winners, a gallery of envelopes that were awarded an Honorable mention, another gallery of Junior contestants and a galery of Child contestants (Kindergarten through Grade 5).
The main page of the 2007 Graceful Envelope Contest site also has link to competitons held in the past. Since it has been running since 2001 ther is a lot of eye candy on this site.
Anyone who is interested in paper arts, book arts, fabric postcards, journal quilts, scrap booking, and visual journals will find these envelopes inspirational as many of the design challenges are the same.