There isn't a single place to look for resources on F# and machine learning, but here are a couple of links that may be quite useful:
Numerical Computing section on MSDN is a good resource on using various numerical libraries from F#. The most advanced library that implements linear algebra and other algorithsm useful in machine learning is Math.NET Numerics.
Visualizing Data section on MSDN has some resources on charting in F#. The FSharpChart library is now maintained by Carl Nolan who regularly posts updates to his blog.
There are also a few personal pages of people who are working on relevant topics:
Jurgen van Gael (who did PhD in machine learning) contributed to the Math.NET library and you can read about his experience here.
Yin Zhu who wrote the Numerical Computing chapter on MSDN (and is a PhD student interested in machine learning) has quite a few excellent articles on his blog.
