Yeah, I remember seeing your blog crop up while I was busy regrading fellowship of the ring myself. In fact, you have pretty much the same screencap as the one I posted regraded on your blog. Our approach to regrading this was very similar, using the snow and fade to white as a reference for what should be 'white'.
The thing is though that I found that you can't just remove the uniform green tint and leave it at that, Hobbiton starts looking a little too red IMHO, so I had to selectively colour grade that part of the film to give it the green colouring that it originally had that made Hobbiton look so lush and special, a paradise in Middle Earth. Others may like that reddish Hobbiton more but I liked Hobbiton too much as it was theatrically, in the dvds and the theatrical blu-ray, lush and green, to leave it like that.
As soon as I get my upload speed majorly increased, I was planning to upload this in blu-ray quality as well (two dual layer blu-rays!!!). Do you have any plans to upload your version as well You_Too?
Anyway, getting back to Star Wars, i've seen those 70mm frames on jedi1.net before, pretty much all of them have yellow, green or red fading to my eyes with one or two exceptions, I don't think that they can be all that useful as far as colour grading is concerned IMHO. Did you get round to checking out my new clip from ESB btw? If you did, what did you think of the brightness?