Anyone know of a website that list furture CD'S?

For example, when is Diana Krall coming out with a new CD? How about Nora Jones? Just tired of the same old fair. i.e.Josh Groban and Celtic Woman and etc. Any good Classical coming? Jazz? Bluegrass?
champtree, cduniverse are two I can think of at the moment.
Amazon and Tower Records both list future releases. I prefer Tower because you can sort by style as well as release date