I was particularly thinking about things like order and group in list comprehensions[1]. Turns out the paper introducing them was actually from 2007, so maybe it's not that recent :). (I thought it was newer than that.)

[1]: http://research.microsoft.com/en-us/um/people/simonpj/papers...

Here is a random video I found earlier where SPJ talks both about this in particular and the exchange of ideas between Haskell and .NET in general: http://www.youtube.com/watch?v=iSmkqocn0oQ