That was my fault, sorry. The feature you're talking about was what you could call a submission "preview"--any submissions you made would be visible to you (but no one else) on the product or part details page until a moderator reviewed the changes.
I haven't really announced this, but I recently rewrote the back end for shmax.com, and I couldn't figure out a clean way to keep the preview feature--which was sort of a hacky mess--in the new architecture. I did intend to re-implement it after things had settled down a bit, but I was also toying with the idea of, well, not. Thoughts?