Bullet 2.85 (previously known as 2.84) introduces pybullet, easy to use Python bindings, as well as Virtual Reality support for HTC Vice and Oculus Rift. In addition, there is support for Inverse Kinematics and Inverse Dynamics. This release is marked as 'prerelease' until the documentation is updated. See also this video: https://www.youtube.com/watch?v=VMJyZtHQL50
Bullet Physics SDK 2.83 is a first release using the new example browser. See the docs/BulletQuickstart.pdf how to get started.
Note that the example browser needs a bit more work and some old demos are not in the new example structures yes, this is a todo for a future release.