Bryan O'Sullivan gave a 3-hour "intro to Haskell" workshop at the Strange Loop conference, on September 18, 2011. These are the slides he used, with a couple of post-workshop bugs fixed.
You can read his slides online here.
They're formatted from Markdown to HTML using John MacFarlane's fabulous pandoc tool.
I have translated the sheets to Dutch, and changed quite some things to make them fit a series of workshops for colleques at Atos
You can read my slides online here.
Feel free to use them yourself, but if you do, please give attribution to Bryan and me. Thanks!