LINQPad is really nice for this. You get intellisense and an integrated debugger if you pony up for the license.

I worked hard to make sure F# got equal support to C# - semantic highlighting, code completion, all that. The only real difference is the F# builds are a bit slower than C#.

I don't do F#, so I'm not qualified to comment.

Learn it in a week: http://fsharpforfunandprofit.com/

Make a comment.

I'd rather have someone with real experience comment than someone who has done a few tutorials over the course of a week.

Edit: That being said, F#FFAP is a fantastic resource.