Umm how the hell am I suppose to type "ƒ" every time? I know I can "map" it to some other character, but that kinda defeats the purpose, no? Other than that it looks nifty, but since I'm already using jQuery in all of my projects I don't think I have much use for it.
It's a Mac thing. Alt-f prints ƒ on Mac. On any other OS it's a pain in the ass. Granted, you can use fu but I think it would have been wiser to promote the usage of fu instead of ƒ.