Not that I've actually had a use for them. I can get what I want done in C, C++, Java, Perl, Python, Ruby, Tcl/Tk or Lua (or any other language that I might know). Learning programming languages has been getting in the way of me writing code. Also no new technologies for the same reason.
My Amazon wish list is now three pages shorter.
My resolution is therefore to write the actual applications!
Interesting things are the bane of my life.