Residents asking if the Second Life Viewer is compatible with Windows 7 is a very hot! question in the forums.
The answer is YES, the Second Life Viewer is supported on both 32-bit and 64-bit Windows 7.
Long story short: the current System Requirements page is confusing because it says "Windows 7 (32-bit only)". That refers to the Viewer being a 32-bit executable, not that "Second Life only works with 32-bit Windows 7".
A SysReq update is pending, but since this is often a time-sensitive question that affects the next operating system and computer you choose (and what a pain it is to change that once you've installed), I've chopped the slop and put up a wiki help page (which can be updated in seconds) to clarify this, with more details. Special thanks to Q and Esbee Linden for confirmation. Bookmark and share with your friends:
Move lively context found in this forum thread which you can comment on, thanks to Irene Muni for encouraging more visibility.