It's probably worth pointing out that this project has no relation to Infer.NET (I don't think so, anyway), another machine learning library from Microsoft Research and written in F#.
this (Infer) looks like it's for a different kind of inference: classification (essentially linear, but with a few bells and whistles).
(not graphical models right now; probabilities.clj is very much lacking.)
BTW, Infer.NET is written in C#, but there is an F# wrapper.