"Dmitri O.Kondratiev"
Which platform - Mac OS X, Linux or Win32 is best for development with GHC today?
I think most developers use Linux, which tends to ensure that more stuff will work there. Most developers will also tend to use recent versions of everything, so go with Fedora or Ubuntu or Debian testing, rather than Debian stable or RHEL. In general, Haskell seems to be quite portable (in contrast to Java, say), and difficulties seem to be mostly around stuff that requires interaction with specific C libraries.
How are things with Ubuntu?
I use Ubuntu. Most stuff is fairly up-to-date, but even with six-month releases, it's lagging the cutting edge, and GHC is still 6.12. Thus, I tend to install development stuff via Cabal these days, which at least partly evens out the playing ground between different distributions. In general, I like Ubuntu for adding a regular schedule to Debian, and making recommended choices (e.g., which SMTP server to choose?). I also like the expermients with the user interface, although I don't use them myself (xmonad is still less obstrusive and much smaller and faster :-) Downsides is the huge bug database, where bugs seldom seem to be dealt with. (Also, I'm constantly annoyed at all the nice bits that are missing from our RHEL/CentOS servers.) An alternative for me might be Debian testing.
I don't want to start religious wars,
I tried to be non-flammable. Let me know if you would like opinions on Emacs vs vi! -k -- If I haven't seen further, it is by standing in the footprints of giants