IE9 RTM is available from this link. However my first experience with it is that it is very jerky while moving the panos. It not nearly as smooth as IE8 was. The interface is better and other web pages seem to load faster but for panos is seems like a thumbs down so far.
http://download.microsoft.com/download/C/1/6…ws7-x64-enu.exe
http://download.microsoft.com/download/C/3/B…ws7-x86-enu.exe
EDIT: more and more i use IE9 with tours the more i hate it. i already found myself using mozilla to view locally and now almost any pano. I like IE9 just not with panos. I wonder if other flash apps are slow?