If you visit the new PGSQL site http://www.postgresql.org , you'll see that in the binary download section, there is a proof of concept binary for PGSQL on Windows.
What does everyone think of this?
For me, it would be great as a developement tool. I don't need a production environment for developement. I'll use a *NIX server for my production needs, but as far as developement, I like my Windows 2000 machine.