Don't feel bad. No one who wasn't under NDA knew about the nano months in advance. The only clue was that over the summer it was reported that Apple had cut a deal with Samsung to buy a lot of 4 GB flash chips. But, even then, most speculation was around a high capacity Shuffle and a mini with a color screen and larger hard drive. It's pretty amazing that Apple had a million nanos built by the launch date and almost no information leaked.

Yeah, Engadet will keep you up on all things like this - both real and speculated. Gizmodo is good, too. It has less posts but catches everything important.