I posted your query on the Lean & Strong message board (tip - if you want a quick answer to questions, that's definitely the place to go!). Shannon of L&S replied as follows:
"No nutrition in popcorn
and 2 eggwhites? 7 grams protein?
Oy Vey

"
Basically I believe that's why popcorn isn't on Bill Phillips' 'authorized' list - there's just nothing there except calories...and you need the nutrients you would get from, say, brown rice, potatoes, oatmeal, etc. to fuel your workouts.
As for eggwhites, she's saying you need a LOT more than that for your protein portion. Definitely not a palm-sized portion at all! It's really important not to short yourself on your eating on BFL. You've GOT to keep that bod fed if you want it to build muscle and burn fat!!!
I think of it as similar to feeding a fire in the fireplace - if you don't keep throwing fuel in, the fire will go out. But - if you throw a HUGE log on the fire, it won't burn and will be stored as fat. So in my mind anyway, that's why we have six small meals - to continously feed the furnace and keep the fires burning!
I only eat eggs on my Free Day and with Joe's Special, but if you look at the sample menus that people post on L&S, you will see that many of the women eat SEVEN eggwhites and one yolk in a protein portion, while the men eat anywhere from 8 to 11 egg whites. Personally I prefer Egg Beaters myself. Much easier to prepare IMO...