Haskell wiki > Netwire has some good introductory material to Netwire, but now (as a hobbyist Haskeller) I'm interested in something more. What kinds of simple exercises would be beneficial in order to sharpen my arrow/netwire skills?
I'm sorry that I didn't get around to updating the wiki page yet. I hope to extend it in the coming days. For now the #haskell channel on Freenode is probably your best bet.