Dave has put up a snapshot of the new 8.3 installer on the pgFoundry page. This contains a whole lot of things for Windows users to test:
So if you're a windows user, and want to test things, please download this file and let us know (through the mailinglists!) how it works out for you.
NOTE! This is a pre-beta development snapshot of both the server and the installer. DO NOT USE IN PRODUCTION!