One of the new features I'm pretty excited about is the new postgis gui batch features that allows not only for multiple import of shape files, but also multiple export of shapefiles. It will work fine with your postgis 1.5 databases as well. We have windows standalone gui binaries at http://www.postgis.org/download/windows.
Is this cool or what? Here are some screen shots with it loaded as a pgAdmin plugin.
PostGIS 2.0.0 windows binaries are up http://www.postgis.org/download/windows/#windbinaries. This is the first ever version of PostGIS to support PostgreSQL 64-bit windows installs. We want to extend a big thank you again to our generous sponsors for helping make this a reality.
We are in the middle of packaging the installers for both windows 32-bit and 64-bit installs and hope to have those up in the coming weeks for those who require that comforting Setup button. They will then be available via StackBuilder.