When I click a download link for an azw file and choose "open with: mobipocket.reader" instead of "save as", I am able to read it in mobipocket reader. But if I save it to the computer and then try to open it, it won't work.
strange!
http://manybooks.net/titles/tzusun132132.html
make sure you choose kindle in the drop down box for the azw file and after you click download, choose open with instead of save