Recently I have been toying around (Project Euler problems and such)
with Haskell, Smalltalk (Squeak), Scala and a bit of Clojure. Here are
some links you might find interesting...

Haskell:
http://learnyouahaskell.com/ (a bit like the Poignant Guide)
http://book.realworldhaskell.org/
http://en.wikibooks.org/wiki/Haskell
http://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_Hours

Smalltalk:
http://www.squeak.org/
http://squeakbyexample.org/
http://www.seaside.st/

Scala:
http://www.scala-lang.org/
http://www.scala-lang.org/node/104

Clojure:
https://peepcode.com/products/functional-programming-with-clojure

HTH,
Michael