Recently scalaz caught my eye. It looks very interesting, but I have not found any good introduction to the library. Seems that scalaz incorporates a lot of ideas from haskell and mathematics. Most articles that I found assume that you already feel comfortable with these concepts.
What I'm looking for is gradual introduction to the library and underlying concepts - from simple and basic concepts to more advanced (which basesd in basics).
I also looked to the examples, but it's hard for me to find the point where I should start to learn library.
Can somebody recommend me some good scalaz introduction or tutorial (that covers basics and advanced concepts)? Or give me starting point in the answer.
Update
Thanks everybody for the great answers! I summarized all of the answers and added some more links in my blog:
And for those stuggling to find the API documentation for Scalaz they are here:
http://docs.typelevel.org/api/scalaz/nightly/index.html#package
Answer
Hieko Seeberger has recently started blogging on functional programming and category theory applied to Scala. Two opening posts are very educative (and easy to read), and can help getting over the initial barrier in learning scalaz.
EDIT: When you get comfortable with the fundamentals, I would recommend you to read through http://apocalisp.wordpress.com/ (blog driven by Runar Oli and Mark Harrah) and the weblog of Tony Morris
UPD: "Functors, Applicative Functors and Monoids" chapter of "Learn You a Haskell for Great Good!" has a lot of examples in Haskell with detailed explanations, which can easily be translated to Scala/scalaz.