Dear all,Open source textbooks was a part of discussion many times in this mailing group. Our product on same concept is ready for public beta - http://www.uzity.com/[ We are the same team who created Fedena - http://www.projectfedena.org/ - award winning opensource student information system. We won MIT TR35 2012 for the same product. http://www2.technologyreview.com/tr35/profile.aspx?TRID=1248 ]Uzity is a more matured approach from a young startup team like ours. We always loved the concept of Github. If the project is opensource, you can use the service for free. If the project is closed source, pay us for the service. We plan to launch Uzity around same business model. The entire service and features are free as long as the content built and aggregated by you is kept open. You will have to pay if the content need to be kept private.Uzity will enable more Khan Academies online. For Uzity to be a success, it needs more collaboration in open contents. If you need access to the beta, please reply to me.Thank you.Unni Krishnan Koroth