While it's always appreciated for people to post their great experiences with freelancers, the fact is that by doing so you are potentially harming yourself in the future.
Say he begins getting a lot of work now or even a full-time position and you need him again in the future, you may unfortunately get the old "Sorry, I'd love to but I am too busy now".
Like any good secret, you should keep it for yourself (unless you don't intend to ever have much need for him, then helping him find more work is a great thing to do!)
