[Haskell-cafe] derivation of mapP, a parallel, lazy map

Hello, everyone. I have just written a tutorial (sort of) on Haskell concurrency, specifically on the derivation of a function mapP, a parallel version of map. I wrote this because I am fairly new to Haskell, and I didn't realize how easy concurrent code is until I wrote this, and because I could not find a tutorial describing a parallel implementation of map. If anybody is curious to see this, the page is http://zwell.net/content/haskell.html#mapP . I would appreciate any criticism, too. I hope somebody finds this helpful. Dan Zwell