[COFF] What languges would you like to learn?

[Nemo Nusquam]

A recent thread makes me wonder which languages would people like to 
learn?  (I confess to trying, as Dave does, but time prevents anything 
more that learing syntax and writing toy programmes.  One must write 
something substantial -- not synonomous with large -- to really learn a 
language.)

Erlang, Smalltalk, Prolog, Haskell, and Scheme come to mind...

N.