This may be a little outdated as the release was back on the 5th of May. However, for those of you who do not know, you can download the latest version of Windows 7 right here with your Windows Live ID.
Some of the changes includes a Windows XP mode, which is something like running a Windows XP VPC on Windoes 7, turning off features such as Internet Explorer and Windows Media Player, a modified Aero Peek, better performances and 30 0ther changes from beta (Build 7000) to RC (Build 7100) as shown here.
I am itching to get it installed during the weekend already. Time to get started!