I posted a couple of days ago that Neil Gaiman’s Fragile Things had just been released as a $7.99 mass market paperback, but still cost $9.59 for the Kindle. I just looked again, and now it’s $7.99 for the Kindle, so I guess somebody (or some automated process) does keep an eye on these things and adjust Kindle prices downward when a cheaper hard-copy version of a book is released.
Oh, and I just noticed that Interworld is only $3.99 for the Kindle. I already have the hardcover on that one, but if you like Gaiman and haven’t read it, it’s a good book. (Not great, but fun, and a quick read.)