The title pretty much says it all: I have finally finished (I hope) updating the Typeclassopedia to reflect various recent changes to the language and standard libraries (such as the AMP and BBP/FTP). Along the way I also added more links to related reading as well as more exercises.
How you can help
I am always on the lookout for more exercises to add and for more links to interesting further reading. If you know of a cool exercise or a cool paper or blog post that helps explain/illustrate/apply a standard Haskell type class, please let me know (or just add it yourself, it’s a wiki!). And, of course, the same goes if you notice any errors or confusing bits.