The F# Open Source Group has developed a super-powerful F# Emacs mode, including Intellisense auto-completion, errors-in-current-file, go-to-definition and tooltip support for types/documentation for functions etc. This brings much of the power of F# visual editing to a more traditional (and very widely used) text-editor environment, across multiple platforms, and supports F# 3.0 including type providers etc. The work is nearing the end of the prototype phase and I'd encourage those of you who use Emacs [...]