Myself and another non-Googler wrote and worked on a portion of the code. We'd of course have to get it blessed and merged by G, which wasn't that bad.
My problem became when a Googler started messing around in that portion of the code, changed it, got it approved, without it notifying the two of us who wrote it. Not that we'd need to be approvers or anything, just would have been nice to have gotten some heads up so we could see how it was changing. I only know as it ended up having bad behavior, went to see what changed, and wrote a rant on the mailing list about it :).