I wish I had anything interesting to say. I'm currently experimenting with it to see if it's a useful approach to build a game that can sustain a solid 90fps.

Just pushing triangles isn't a problem (so far), but I'm still unclear how much of the engine logic will need to live in a low level language versus within LFE. The BEAM also presents certain architectural possibilities (especially for simulation), that are completely atypical for games.

It's promising enough that I'll continue pursuing this; we'll see where I end up in a few more months. Sorry I can't give more meat than that!