@CSharpner:Hey @CSharpner,

Sorry to say, but here's a link confirming it. http://www.geek.com/articles/geek-pick/metro-apps-will-be-windows-store-exclusive-microsoft-to-take-30-percent-cut-20110920/

Something you also have to factor in, however: MS have said that devs will be allowed to side-loading apps, so somebody (XDA anyone?) may make side-loading available.