"Pear OS is no longer available for download. Its future is now in hands of a company who wants to remain anonymous for the moment. The concept has pleased them it and now wants to continue and improve the system for their own products. I can not give a name but it is a very large company well known ... I want to thank all users, moderators and other developers who have made Pear OS it is today, that without this adventure would not have been possible. I'm going in another direction. Pear Cloud users must recover their files on Pear Cloud servers. In 10 days, the files will be deleted and the server will be offline. Another big thank you to all and I hope to return to the scene of open source very quickly. Cordially. David" -http://pearlinux.org/
Sad to see it go, they had a decent following because of the OS's Mac OS X feel and excellent collection of apps that came "out of the box".
Here is a screenshot of what the OS looks like:
Good bye, beautiful friend.