[Haskell-cafe] Weak hashtable memoization code?

Hi all, Does anyone have a nice bit of example code to implement memoization using weak pointers and hash tables? It would be nice to have a pre-packaged module that I could just use, which has already been tested. The contents of Data.WeakPtr seem a bit lower-level than I'd rather work with. -- David Roundy http://www.darcs.net