[kdw]

For what it's worth, I'm running 10.6 on one of my Macs, and I still have some Ports that don't work on it.

In particular, I've had issues with ghc and R. Most other software (both common and uncommon) has been okay, but I'd recommend most people wait another month or so, unless 10.6 fixes something important to you, or is otherwise significant.

[gcv]

ghc is one of a handful of MacPorts which does not work with Snow Leopard, although this should be fixed soon (32-bit only, though): http://trac.macports.org/ticket/20132

[simonista]

I have a friend who's been fighting through installing it from source because he's sick of waiting (apparently cabal was having trouble... not really sure). Hope macports gets things sorted out soon.