Bloguear, difundir, descargar y distribuir por cualquier medio! xD. Enjoy it! FYI.. please note the full eBook will be available and free by PDC.. great tool for Faculty and Students http://blogs.msdn.com/b/microsoft_press/archive/2010/08/02/free-ebook-petzold-s-programming-windows-phone-7-special-excerpt-2.aspx Download the PDF here<http://download.microsoft.com/download/0/D/9/0D919C81-6E31-436C-8FB0-A75BBEBB6AEA/ProgrammingWindowsPhone7(SpecialExcerpt2).pdf>. Download the XPS here<http://download.microsoft.com/download/0/D/9/0D919C81-6E31-436C-8FB0-A75BBEBB6AEA/ProgrammingWindowsPhone7(SpecialExcerpt2).xps>. And download the sample code here<http://download.microsoft.com/download/0/D/9/0D919C81-6E31-436C-8FB0-A75BBEBB6AEA/ProgrammingWindowsPhone7Code(SpecialExcerpt2).zip>. We'll be finishing Charles's full book in time for PDC10 (October 28). And, guess what: it will also be free.