Write Yourself a Scheme in 48 Hours (2007)

Quick heads up: the PDF version has not been updated to reflect many corrections made to the wiki version.

For this reason, I'd rather work with the wiki version than the PDF.

there is a v2.0 version of this here, it may still be a WIP: https://www.wespiser.com/writings/wyas/home.html

Author here, yes, It is now complete, or complete to the spec that was originally set.

I'm not very familiar with Haskell - is this still a useful first tutorial or has the language changed too much since 2007?

The areas of Haskell they show haven't really changed in the time since. If you enjoy reading it, I say it's a useful tutorial.