No, I didn't either. It looks like a fun Phantom Tollbooth-ish yarn, and Uin's part in it is generally well-received by the critics. I'm thinking of getting it and reviewing it here.
Mon Feb 03 2003 23:29:
I was skimming through The Book of Lost Tales, looking, for reasons which need not concern us at the moment, to find historical names that orcs might give their children. It turns out that The Book of Lost Tales contains no orcs and very few orc role models, so I'm using The Silmarillion instead. However, The Book of Lost Tales does contain a cool Lost Tale about an enormous whale named Uin, who is hitched up to a continent and tows the entire continent elsewhere, much like in this Penny Arcade cartoon. I tried to find out more about Uin but there is no more, except that Uin appears in a children's book Tolkien wrote called Roverandom.