Only time I ever used IE was to download Firefox when I first installed windows 7. So, I have no idea what you are talking about. My experiences haS been great.
Uh, all right? How dickish of me to suggest a way to forego using an application he or she doesn't like for even the one time that person feels he or she must.
"Exchange 2010 adds some important changes for non-Internet Explorer browsers by officially and fully supporting both Firefox and Safari with its Premium version of the Outlook Web Access client."
OWA degrades to what I deem a much cleaner client than the version you get if you use IE. The OWA you get in IE7+ uses ActiveX or some sort of Windows-specific JavaScript trickery which is why they restrict it's access to a browser they know will be used on Windows.
I don't really know what WGA is but have seen logos for it in the computer info dialog. I regularly download things from MSDNAA in Chrome, haven't tried the full MSDN portal.