[tomh-]

Microsoft is the employer of two of the developers for the GHC compiler. Microsoft certainly has technologies related to Haskell such as F#. Also, a lot of the ideas for the new features of C# are based on the research and experience they've gained with Haskell. Linq, Lambda's, Task Parallel Framework etc.

[riffraff]

also in the other direction! Simon Peyton-Jones and Phil Wadler wrote a paper where they basically backported (and improved on) some LINQ features in haskell's list comprehensions: http://research.microsoft.com/en-us/um/people/simonpj/papers...