After some troubles, rc bug creation and a lot of help from Holger Levsen, it was possible to unblock libg3d for lenny. Lenny has currently 0.0.6-3 (by accident as some release manager said), but this will change in the next days - but the big endian fixes are in it too
Update 2008-11-23: It was migrated to testing now. Let's hope that Lenny gets released soon