On the top of the Blender2Ogre project page it says "Active Development taken over by Mind-Calamity" and a link to Mind-Calamity's project on bitbucket at https://bitbucket.org/MindCalamity/blender2ogre, but if you go to that page you get 404'd! I guess he destroyed the project, or it was somehow removed from bitbucket.

The only reason I ask this is because I can't seem to make Ogre materials with multiple passes/layers with this exporter. Blender just freaks out and the plugin throws errors, and a bunch of empty UI boxes appear in the Materials tab where the options for each pass should be.