Jean-Baptiste Note has taken my latest cross-compile build of GTK 2.10 and created a Windows installer. If anyone is interested, check it out! Thanks very much to Jean-Baptiste for that.
He points out that it doesn’t work under WINE, but neither have any previous GTK builds for Win32 so I guess nobody will lose sleep over that. It apparently doesn’t detect the version of Windows correctly or something and assumes that it is in Windows 95 or something.