The support for using dynamic languages such as Ruby or Python to code ASP.NET pages was announced for future versions of ASP.NET in the ASP.NET futures.
Unless I am mistaken, it means that we eventually will be able to write control event handlers in Python or even Ruby - which is certainly more fun than in VB.NET or even in C#, but is it really so important ?
What would be *really* cool if the whole ASP.NET become more agile and more "rail-ish". To make overall architecture more flexible - such as departure from not very flexible page-centric architecture towards MVC and routing. Maybe some version of ActiveRecord ? Or even multiple (and pluggable) template languages ? That would be really something.