The mainstreaming of blogging isn't exactly news anymore — just look at, well, this Website — but still, the Saks Fifth Avenue windows that debuted today must mark some kind of milestone. Several have been done up as — and it feels weird just to type this — page layouts from the fashion-forward blog the Sartorialist. The wily Saks designers left no detail out, capturing even the fonts and the little envelope icon (hey, those pants got seven comments!). We impulsively clicked over to the Sartorialist half-expecting to find some sort of mind-blowing switcheroo — perhaps its blogspot.com template looks like … Saks Fifth Avenue! But no, it was the usual design, although the top story was indeed a report from a Saks event in San Francisco. So what's the deal behind what must rank as one of the fashion world's odder cross-promotions?

Head sartorialist Scott Schuman writes us: "We have begun a series of events at Saks stores in which I interview a designer and cover it on my blog." And what's in it for Saks? "Michael Macko, VP Fashion Director Men's, is the guy that really saw the potential for something that would be special and different for the men's division."

We're guessing that the Satorialist's status as CondeNet's semi-official fashion blogger doesn't hurt either.