The blender to egg exporter (called Chicken) we were using is no more supported by recent versions of blender. There is a new tool called YABEE, but exporting our maps to egg with it give me an error.
I wasn't aware of YABEE, but I've been use Blender's "Export -> DirectX (.x)" feature, followed by Panda3d's "x2egg" program from the command-line. It's got some things you can set (like flattening everything into one object), but the simplest use is just: "x2egg my-map.x my-map.egg | pview my-map.egg"
The only caveat I've noticed in that program is that your textures have to be readable during the x2egg process. As you know, Blender doesn't care whether it has the actual texture file or not, but x2egg will error out if you don't.
Also: http://code.google.com/p/yabee/issues/detail?id=22 (http://code.google.com/p/yabee/issues/detail?id=22)
Ah great news, thank you so much for the x2egg trick.