Last Saturday I have got opportunity (or time :-)) to watch a screencast by Luca Bolognese on Functional language F# from MS.Watch the videohere.
My first impression on F# is that difficult syntax as compared to matlab but I believe there will be lot more language enhancements in coming release. Huge promise for Quant. Finance applications as we can easily integrate F# libs with other dotnet languages.
You can download F# September 2008 CTP from here
I will try to update my blog with some Quant. Libs written in F#.