http://gadgetaholic.com/content/view/33/30/
As we mentioned, the BH100 does not support the HD-DVD's HDi interactive menu system. When calling up the disc menus, it displays a much simpler-looking HD-DVD menus at the bottom of the screen than the ones on the HD-A2. The available options were Title, Scene, Subtitle, and Audio. Missing was the “Special Features” menu present when played on the HD-A2. This meant, no access to features like the Director's Comments and music video by Nelly (boo hoo). According to c|net, LG has confirmed that neither the HDi functionality nor the HDMI 1.3a support will be upgradeable via firmware. Well, thanks, LG.
I guess I'll be holding out for LG's second gen player. Hopefully it will support HDi and be cheaper.