I installed during a not so exciting, sponsored keynote at JavaONE OpenSolaris in VirtualBox - it worked perfectly. Recently I saw at Devoxx Brian Leonard's session about OpenSolaris, TimeSlider, VirtualBox and testing - everything worked really well. I was especially impressed by the VirtualBox and ZFS integration. So far it looks promising - the remaining challenge is good device (w-lan, graphics device etc.) support for notebooks - I just remember the old linux days :-). It seems like Toshiba will ship some notebooks with OpenSolaris - this is interesting. What's about lenovo? It would be the next step... :-)
NEW: Online Workhop Effective WebApps without Frameworks is also coming to: MUC Airport.