Linden lab intends to charge a small fee to access Sansar (no word on how much yet)
Linden Lab will initially prohibit "adult" content for project Sansar. According to Peter Gray, Sansar Spokesman:
Adult content won't be allowed at the opening of Sansar's creator beta this summer. Ultimately, we want Sansar to be an open platform that enables creators to make all kinds of experiences, but early on we also want to be careful that a single genre of content doesn't come to define the platform and potentially limit its appeal to other creators.