<A target="_blank" href="http://www.pcworld.com/article/238373/windows_8_more_app_store_evidence_surfaces.html#tk.rss_main">Speculation about a Windows app store has been around since the first screen</A> shots of Win8 showing a "Store" square. Now Steven Sinofsy, Microsoft's president of Windows and Windows Live, appears to be confirming the rumor.