The first is the work of Josh Ellingson, who seems to be a pretty fine illustrator:
Here's one from a Flickr user named bredlo, which may appeal to fans of the classic Airstream camper:
If you know why a pink polar bear attacking the diner is funny (from this guy), please let me know:
Rick Veitch has a great reworking of the diner as it might look in Iraq (click it to see it bigger):
There's a Sesame Street version (among other great Sesame Street versions of classic art):
If you want to see the rest of the parodies, click below.
First batch
Second batch
Third batch
Star Wars parody
New Year's parody