This is the FGF4 retrogene paper about why your dog has short legs:
Science 325:995-998, 21 August 2009 (with a corgi sighting on p.918!)
pp. 958-959 has a good discussion of how "retrogenes" happen. This was new to me and it's REALLY WEIRD when you think about it.
Interestingly, the retrogene has a 1-base variation that is NOT found in the source FGF4 gene of domestic dogs, but IS found in the FGF4 gene of wolves from eastern Europe and the Middle East. A molecular fossil.
Science (search on "corgi")
Sorry this is late, I'm sure the newsstands are all sold-out.