Interesting looking at the (few) pistols that most websites still have in stock. The overall trend I see is .40 cal is still in stock. I can easily find Glock .40's of all varieties in stock, but most 9mm is sold out, even most 45 is sold out. Even 10mm and .357 sig is sold out! but .40 cal is still available!?
... pretty much the same story in the XD/XDM and M&P lines. Seems .40 is a tad less popular than I thought...
(bear in mind that the "nice" models of .40s like the one Carlos posted are still sold out in most places... but in something like 9mm, even the crappy models are 95% sold out across the board)