OrientDB is released in Version 2.0.2 and you can download it from here.
As you can see in the graphic below, OrientDB is on rank 3 of 16 other Graph / Multi Model Databases, so a real serious candidate as Graph and Document-oriented Database!
I plan some tutorials about OrientDB as soon as possible. There will also be some Youtube Videos be available.
So i hope, you already clicked the Link, download OrientDB and start some experiments with it.