I don't see why everyone is hating on Microsoft for investing in the Nook. They probably could have created their own ebook reader, and probably have something cooked up in their labs. I think it'd be better for them to invest in the ebook market though rather than trying to launch another ebook reader. The Nook is a product that is out there, that is currently being used, that has market share. It's better for consumers too I imagine, because instead of just stuffing another reader in the market they're working to improve one of the existing ones.
The reason is simple, "hating Microsoft" is the favourite hobby of a lot of people on these forums.