Try Out OpenSolaris Learning Cloud Service
The OpenSolaris Learning Cloud Service, an on-demand lab, offers all the features of recently released OpenSolaris 2008.11. All you need is a My Sun account, which you can sign up for free. Do read the instructions, which include the login and password for accessing the service and suggestions of features to check out.
I got a demo yesterday from a colleague. Pretty neat!
To learn about cloud computing, see this recent Sun article.