Sorry about the lack of a picture here, but it is a little tricky to scan a mug, but maybe soon I can figure out how to get a good scan of it on here.  I can at least tell you what it looks like.  On the front is the poster zombie with Dawn logo.  On the back it reads as follows: "The people it kills get up and kill!" Then below that it says Dawn of the Dead 1978-1999.  Finally on the last row it says "Undead after 20 years and still rotting."