As much as i love Solaris (and ZFS and dtrace and Zones and all the nice things Sun and Joyent brought) i wish this would be available for Linux as well.
Edit: Ok, so it's called "Joyent Manta Storage Service" and the tutorial talks about creating accounts on the joyent cloud. So this is a Service, not a software? Sorry about the confusion then... I thought it would be a new software for SmartOS or Solaris...