I am looking to build a set of dynamic scripts, stored in a table, that will act as business rules against my EF model. In the past, I was inclined to use IronRuby or IronPython when thinking about my options. Much to my dismay, I just read that both are dead! (http://www.ironshay.com/post/IronRuby-and-IronPython-are-Officially-Handed-Over-to-the-Community-IronRuby-Tools-for-VS-is-Out-and-More!.aspx) What scripting language, compatible and fast with .NET, should I use now?
I don't believe either IronRuby or IronPython is dead, actually... they've recently changed ownership effectively, but they're still being worked on.
Anyway, you might also want to look at Boo.