The Microsoft server is already struggling due to thousands of people refreshing the Windows 7 page every second trying to be the first to download Windows 7 Beta.
Good news is, you don’t have to wait - you can get it now! Here are a couple of links officially from Microsoft that lead to the Windows 7 Beta download for 32-bit and 64-bit editions
Update: Looks like all the links are down. An announcement from Brandon LeBlanc tells us they are working on improving the conditions with the server before officially posting the link. However we have found official ISO download links straight from the Microsoft server.
Make sure to check out our post on 10 things you need to know before installing Windows 7 Beta (full Story with Thanks)