I was trying to install Windows 7 via Boot Camp on a MacBook, but the Boot Camp Assistant was not downloading the drivers. It was getting stuck at about 20% and would not budge. I found a discussion page (https://discussions.apple.com/message/16605226#16605226) that had a manual download link here.
General Apple Boot Camp support (http://www.apple.com/support/bootcamp/) was pretty good, but it did not have this link.
Christopher Baek 