According to the top page of HaskellWiki (see http://www.haskell.org/) (under "February 2010" under "1 Headlines"), there is an alpha version of a new interactive, online Haskell interpreter entitled "Try Haskell!" at http://tryhaskell.org/. The top panel of the page features an interactive interpreter, while the bottom panel features a text tutorial. The user types in commands in the top panel according to the text tutorial, and the interpreter responds with output. There is also a "Reset" button in the upper right corner of the tool which resets the state of both panels to the default state. I just tried it out, and it appears to have been completed up to Lesson 3. So far, it apparently teaches up to lists. It was fun to try out. This tutorial somehow reminded me of an interactive Scheme tutorial, "Lists And Lists," copyrighted in 1996 by Andrew Plotkin, at http://parchment.googlecode.com/svn/trunk/parchment.html?story=http://parchm.... That tutorial was arranged in the style of an adventure game, while this tutorial is more similar to a very similar Ruby tutorial, "try ruby! (in your browser)" at http://TryRuby.org/. It could be fun if somebody could come up with a Haskell version of the above-mentioned"Lists And Lists," which also includes a text-based Scheme reference on the virtual computer within the adventure game. -- Benjamin L. Russell -- Benjamin L. Russell / DekuDekuplex at Yahoo dot com http://dekudekuplex.wordpress.com/ Translator/Interpreter / Mobile: +011 81 80-3603-6725 "Furuike ya, kawazu tobikomu mizu no oto." -- Matsuo Basho^