Well sort of live; as with many eagerly anticipated things there have been some difficulties. Many are reporting that they servers are slow, or not responding at all. Others can get the page to load but do not see the Download links.
But speaking as someone that grabbed it from a Technet account (last night) I can see hang in there it will be worth it.
Read more here.
Grab it from the CPP directly here.
Windows 7 is...
the next release of the Windows client operating system, built on the secure foundation of Windows Vista and Windows Server 2008. Performance, reliability, security, and compatibility are core tenets of this release as we collect your feedback to meet our engineering goals of making Windows 7 the best-performing and most stable Windows operating system to date. New innovations in the product are designed to augment your ability as an IT professional to better provision and manage increasingly mobile PCs, protect data, and improve both end-user and personal productivity.
See Windows 7 for yourself
We are inviting IT professionals around the world to work with the Windows 7 Beta in their lab environments and secondary PCs to help ensure smooth adoption when the final product is available and to gather feedback from real-world settings.