Kindle App Coming To Android And Windows Tablets

San Francisco Chronicle: "Following Amazon's success with Kindle on the iPad, Amazon is releasing a version of the Kindle app for tablets based on Android and Windows as well. Revamping the Android version of Kindle for tablets is a no-brainer given the number of Android tablets slated to come out in 2011, but the Windows move is a surprising vote of confidence in Microsoft's tablet strategy. ... " I don't get that latter statement at all. Rolling out a Windows version will not be expensive for Amazon to do. Granted, Microsoft's tablet "strategy" looks to many (myself included) like a very late nonstarter. But why shouldn't (wouldn't) Amazon go for the deepest penetration possible?