Download links:
http://code.google.com/p/tubras/wiki/irrb
Change Log:
changes.txt
User Guide:
irrbUserGuide-0.4.pdf
Tutorials (Light Mapping & Transparent Materials) are located here:
http://code.google.com/p/tubras/wiki/irrbTutorials
Notes:
02/13/2009 - If you plan on using the binary mesh (.irrbmesh) reader/writer in your own application, you will need to compile those source files against revision 2200 (or later) of the Irrlicht trunk.
Screen Shots:
(irrb-0.4.blend) (irrb-0.4.blend iwalktest video)

(08-Fog.blend)

(04-Billboard.blend)

(03-Skybox.blend)

Please use this thread to post questions relating to irrb.
Enjoy!