I wrote two new modules on HaskellNet. One is JSON library and the other is memcached client.
Memcached is a distributed memory object caching system. see: http://www.danga.com/memcached/
I take a look at the memcached protocol, and think it simple. So, I'd like to write them in Haskell. I have no confidence whether or not memcached client is suit to HaskellNet, but it will be something usable. I'll think later whether it should come with HaskellNet or not.
The code can be seen at http://darcs.haskell.org/SoC/haskellnet/HaskellNet/Memcache.hs
BTW, after writing my code, I found another implementation of memcached client written in Haskell.
That's the way the world goes.