Plog?

So Yin Blog tells me that Amazon.com has a new feature called the "plog", I.E., a "personalized web log." According to Professor Yin, Plog gives "you short blog posts from authors that amazon thinks you like (based on past purchases)." Since I've been impressed by the efficacy of Amazon's general recommendation program, I think this feature has the potential to be pretty neat too (although I also have to agree with Yin as to the name--"plog?").

But the problem is, I can't find it. Is it up on their site somewhere, and I'm just missing it? Or is it still in the works, with no public release yet?

Help appreciated.