Experimental native build for 64-bit Windows is available.

http://sourceforge.net/projects/novacoin/files/experimental/novacoin-0.4.4.4-win32-amd64.zip/download

Make backup of your data folder before trying this build. Reports are welcome.

Tested for a few hours… It seems that this build is stable enough.

Installer for current release:
http://sourceforge.net/projects/novacoin/files/novacoin-setup-win32-amd64-0.4.4.4.exe/download