Following the canning of the PDC 2007 this year, it has been announced that PDC 2008 will in October 2008. I personally went to PDC 2003, but did not manage to get to PDC 2005. For those who don't what PDC is it's the "Professional Developers Conference" for Microsoft Technologies. Don't let the rather misleading name fool you, as much as there is a developer focus it's also focused heavily on architects and future planning. PDC is completely different to the Microsoft TechEd conferences as it focus on the future roadmap of Microsoft technologies (often years into the future) and focuses on demonstrating working prototypes. In PDC 2003 I got my first copy of Vista (Then called Longhorn) with working versions of all the current .NET 3.0 framework including a then working prototype of WinFX. I was completely blown away at that point with the technology Microsoft had planned – and as we know Microsoft took another 4 years to fully release Vista. So that gives you a taste of the type of information you're going to get wind off. I hope to be there!