Cool :)
There's no reason not to simply reuse the arch-haskell name and resources (e.g. this list, the irc channel, the arch wiki pages) to revive/restart.
(Maybe too many people associate arch-haskell with useless now, but I think we can turn that around...)

I encourage you to release your stuff early, to get contributions from others (like me) even before it's "ready".

Currently I am using [haskell] and [haskell-extra] and it is fine for my needs.
The first is from arch-haskell (xsounds.org/~haskell) and the second is from Fabio Riga (archhaskell.mynerdside.com).
Both are built using cblrepo.

What are you using?
Is it superior?