StainlessS PM'd me.
The thread he linked to above was a different problem than what is being discussed here. The one I'm sure he remembers is this one:
Repair Bad Deinterlacing
We worked on this together and, as you will see, came up with some pretty decent results.
I spent a few minutes replacing the defunct Photobucket images so the thread makes a little more sense.
I have no idea how the quality of what I did would compare to the approach here. One thing for sure: this approach is 100x simpler.