I've started the reMoO project using OpenTK (a OpenGL wrapper for C#), and it handles input and file loading. Right now, it shows the intro video, and if you click, or wait til it's done, puts you into the beginning of the main menu (just a ship with whirling background). No sounds though, because I'm deaf :)
This is sufficient for me to start on the next step, creating a simple 3D shooter. Once that's done, I will be back working on Beyond Beyaan and reMoO.
This is a screenshot showing the comparison between my reMoO (bottom left) and DOSBox (top right):