beta 3 of Goblin XNA v4.0. It contains updated installation guide and the API reference in .chm. The User Manual and ReleaseNotes.txt are still outdated.
The major change from beta 2 is that now the shadow mapping is working fine (with appropriate depth bias and light projection of course), and the stereoscopic rendering is working correctly (Tutorial 13).
To have correct stereo, you will need to calibrate both of the cameras attached to Wrap920AR using CameraCalibration tool (you need to use the calibration pattern from ALVAR for this), and then measure the stereo separation (in terms of position and orientation) using StereoCameraCalibration tool (you need to use the ground marker array used for Tutorial 8 for this). Then, use those calibration files with Tutorial 13 (replace the current Wrap920Left.xml, Wrap920Right.xml, and Wrap920StereoMillimeter.xml with yours since each Wrap920AR will have different parameters). The Wrap920_Adjustment is to align the camera's field of view with the real field of view of a person's eye. You will need to tweak this as well. I will provide more detailed documentation in the final release of v4.0.