I think it is not easily possible to use O3D as "simply" web player solution. You'd have a lot to do, because you'd need to translate the engine into a javascript version (all code which runs O3D is javascript) - and since that, I don't think that JCL likes to make A7 open source

What I could think of is a 3rd party framework in the fashion of Gamestudio, tools to convert MDL's into the O3D format (this would work already if MED could export to Collada) and a WDL parser or WDL->JS converter.