The official Windows 7 Release Candidate is now available for all users through Microsoft's Customer Preview program.
To download Windows 7 RC, you'll need to hit up the link below, head to the bottom of the page to select which version of Windows 7 you want (32-bit or 64-bit), select your language, and then sign in with your Windows Live account (that means you'll need to get one if you don't have one already). After that, just grab yourself a cold drink and wait. So far the download is moving swiftly for me (around 450KB/s) and should be done in just over an hour and a half. Hopefully they can keep it up, but if not, remember: This download and product keys will be available through the end of June, so you've got plenty of time.
If you give it a go, let's hear how the download goes for you in the comments. Thanks Travis!