Microsoft's Professional Developers Conference (or PDC) is a conference for software developers, normally Windows developers.
It covers new and upcoming technology from Microsoft, and so only occurs in the years when there is something new to talk about. The conference is typically hosted by the Los Angeles Convention Center in Los Angeles, California.
PDC 2008 were incredible,at this PDC Microsoft had released a lot of technologies including Windows Azure , first release of .NET framework 3.5 SP1 , Windows 7 with HP multi-touch screen , Surface , .NET 4.0, Visual Studio 2010CPT
so guys i encourage you to check Microsoft PDC website and download those sessions that have you miss
you will find a lot of ideas and technologies
by the way I've implemented many Apps there ideas were taken from this conference, soon i will try to demonstrate some of them in details