I've got a minor amount of experience with InterMedia, but I'm no guru. We have some in-house interest in using it more, though, so I may end up learning.... I don't presently have a Linux box with Oracle installed (postgres only on my machines at home, and we use Solaris and HP-UX at work), but it sounds like that isn't as much of an issue now.
So whatever help I can be I'm happy to offer, but don't expect miracles...*grin*