#1. Read/Write/Speak Russian.
I'm not sure why, I just do.
#2. Convert Perl5 to the DLR
The DLR fascinates me. The fact that it runs [Iron]Python and [Iron]Ruby flips my cool bit. I'm not a CompSci major, and just reading about AST and thinking about parsing Perl source makes my brain hurt.
Oddly enough, I'm not really interested Perl6, Parrot or Pugs. Go figure.