About Lang.Net:
"Lang .NET 2006 is a forum for discussion of programming languages, managed execution environments, compilers, multi-language libraries, and integrated development environments. It provides an excellent opportunity for programming language implementers and researchers from both industry and academia to meet and share their knowledge, experience, and suggestions for future research and development in the area of programming languages."
And now the videos of the speakers are available from http://www.langnetsymposium.com/speakers.asp
I'm gonna listen to Gilad Bracha (Sun Microsystems), John Gough (author of Compiling for .Net CLR and Professor Emeritus of Queensland University of Technology -- my future place for PhD 
), Anders Hejlsberg (C# Guy - Microsoft), Jim Hugunin (Phoenix Guy - Microsoft), and a new language called Zonon (http://zonnon.ethz.ch)