First, damn if that "affair" link wasn't one of the funniest things ever!
Now, while I posted an answer on the other link, I don't think much is happening in Haskell web land. You've got Happstack and maybe a few other frameworks that don't seem to go anywhere. Then you've got FastCgi.
If your like me, then FastCgi is probably good enough for most of your needs. Most clients, I find, don't really have scale issues (and, besides, its good enough for the Ruby folks, right).
If FastCgi ain't your speed...well, perhaps yaws or lift (Erlang and Scala, respectively) are worth a look.
