Anyway, I hope Amazon's commercial interests won't affect the running of the site in a negative way....
It won't.
Have you seen the way people on their forums act? They're ridiculous. "Oh, it's the end of DPReview's non-biased, independent opinion!! Phil Askey is a sellout! *whinge whinge whinge*" Ridiculous.
Amazon owns it. Amazon sells cameras. Their goal is to sell more cameras and peripherals, from any brand, so it really doesn't hurt or benefit them to give a non-biased opinion. If Pentax sales start to pick up, they'll sell more Pentax but less Canon, Nikon, and Sony. If they review better Nikons, then they'll sell less Pentax, Canon, and Sony. They don't lose a sale by giving a bad review. It's just that their customers may prefer buying one type of camera over another, which is pretty much the same thing that happens now with regards to camera reviews. A camera sale is still a camera sale to Amazon, regardless of brand.
However, Amazon could ask for less DSLR reviews and more point and shoot reviews, since P&S cameras sell so incredibly well. Or maybe Amazon will ask for low-end DSLR reviews immediately, while things like the Fuji S5Pro will never be reviewed because they don't plan on selling many. That's my only concern, and I don't think this willl happen.
And besides, all those people who are angry at Phil for "selling out".......when did Phil ever promise you that he'd keep the site running himself for the rest of his life? He had to sell eventually. He just did it today instead of tomorrow. There were probably a lot of other interested parties, but he chose Amazon, and I think it was a good choice.