I just restarted my investigation of Haskell yesterday. This is very sad news. Haskell is a beautiful language, and while I still struggle to write even basic programs in it I can tell that every time I solve an issue I'm having I am becoming a smarter programmer.
He will be missed!
I teach Haskell and I'm working on a book http://haskellbook.com/ with my coauthor. We've been testing with reviewers and it's been going pretty well. We've even been testing with my coauthor's 10 year old https://twitter.com/argumatronic/status/593845481140133888 :)
My guide for learning Haskell is here: https://github.com/bitemyapp/learnhaskell
You can get help in the IRC channel if you'd like as well. I don't recommend using LearnYouAHaskell.
I feel a bit bad as Hudak's books were the only ones I hadn't checked out before starting on my book. Rectifying that soon.