I’ve fixed a bug related to upgrading GHC to version 6.12 (thanks to Cale and the folks on haskell-cafe who helped me with the issue) and got my Befunge-93 interpreter up on hackage. The program is written in haskell (as usual). You should be able to get it soon with a:
$ cabal install Befunge93
If you want to read about how I designed it you can check out the source above, or take a look at my previous blog post.
Please report any bugs to me, and I’m also very interested in patches or suggestions for performance improvements if anyone ends up being interested in this program.
EDIT: Here is the package page: http://hackage.haskell.org/package/Befunge93