I'm so confused. I've driven it for two days without any sound whatsoever. It made a small click noise on startup earlier, but nothing that sounded like a bearing. I have had vanos warnings since the original rod bearing failure that I've cleared and they haven't come back, but I doubt the vanos would be as loud as rod bearings. It was kind of a whiny noise also when it happened, but it hasn't come back. This is going to be so much fun. I'll keep this thread updated as I drive it.
EDIT:
This is a perfect example of the sound that came from the vehicle that night, but it also sounded like there was an audible knock to it as well. If this isn't rod bearings (which by the way - the edge of the journal wasn't even polished) then I'd be amazed. Either way it will be interesting to find out.