The web browser-based 3D world viewer using OpenSim technology and the Unity 3D plug-in I wrote about last month has been in early public Alpha for the last few days: Go here to check it out (free account required). Created by UK development studio Rezzable (a former sponsoring partner to this blog), this demo is very much early Alpha, so don't expect a smooth virtual world experience. (As I write this, I'm running it in another tab of my Chrome browser, and my Tilda Swinton-esque default avatar seems to be stuck walking in an infinite loop.) Rezzable is using this tech for 3D simulations of historical monuments and treasures (such as King Tut's tomb) for their Heritage Key archaeological community website, which was once developed for Second Life. Assets from the SL project have been exported into this new project, which signifies, as Rezzable's Jon Himoff puts it, a crucial milestone in the future of virtual worlds:
Some of the many prims that you will see were originally created in Second Life, so it is also proof that Second Life assets can be 1) pulled over to OpenSim and 2) displayed in a browser.
There's more about this project on Unity's blog, too.