OpenSim reaches 95% compatibility with Second Life

According to OpenSim core developer Charles Krinke, there are 330 key functions in Second Life – and 300 of them have been fully implemented in OpenSim.

Of the remaining 30, half have to do with vehicle physics, he said.

These are the functions that allow virtual passengers to ride in virtual cars, for example, fly virtual planes, or race virtual horses.

Except for these functions, objects can be imported from Second Life to OpenSim, and work much the same way.

http://www.hypergridbusiness.com/2009/05/opensim-reaches-95-compatibility-with-second-life/