The TechEd North America 2011 site provides many HOLs for online access. If you want to play with Juneau but are still waiting for us to go public, now is the time to get started. Notice that you may have to create a new myTechEd ID to download the lab manual.
Our current plan is to ship Juneau with the next SQL Server code-name “Denali” CTP this summer. Register to be notified when the next CTP is available!