It's good to see on John Lam's blog that videos from Lang.NET are now available.

They are Silverlight hosted, but if you want to download them directly, here are the links to the WMV files (right-click to save them to your disk):

Videos/1-00 - Keynote - Jason Zander

Videos/1-01 - CSharp3 - Anders Hejlsberg

Videos/1-05 - Lively Kernel - Dan Ingalls - Sun

Videos/1-06 - JScript - Pratap Lakshman

Videos/1-07 - Irony and ERP Language Challenges - Roman Ivantsov

Videos/2-00 - Democratizing the Cloud with Volta - Erik Meijer

Videos/2-01 - Newspeak - Gilad Braha - Cadence

Videos/2-02 - Resolver One - Giles Thomas - Resolver

Videos/2-03 - Retargeting DLR - Seo Sanghyeon

Videos/2-04 - Visual Basic - Paul Vick

Videos/2-06 - PHP - Wez Furlong

Videos/2-07 - Phalanger - Tomas Petricek

Videos/2-08 - Pex - Peli de Halleux

Videos/2-09 - Numerical Computing with the CLR - Jeffrey Sax - Extreme Optimization

Videos/2-10 - remotion Mixins - Stefan Wenig and Fabian Schmied - rubicon

Videos/2-11 - CodeIt - Serge Baranovsky - submain

Videos/3-00 - IronRuby - John Lam

Videos/3-01 - Ruby.NET - Wayne Kelly

Videos/3-02 - FSharp - Luke Hoban

Videos/3-03 - Parsing Expression Grammars in FSharp - Harry Pierson

Videos/3-04 - NStatic - Wesner Moise - SoftPerson

Videos/3-05 - Moonlight and Mono - Miguel de Icaza

Videos/3-06 - Visual Studio Shell - Aaron Marten

Videos/3-07 - Modeling and Languages - Don Box

Videos/3-07 - Modeling and Languages - Don Box_1

Videos/3-08 - Cobra - Chuck Esterbrook

Videos/3-09 - Intentional - Magnus Christerson