With the help of a lovely lady friend of mine, the two of us were able to put-up the drywall on the ceiling in the "L Room". I owe her big time.
Everything went pretty smoothly with the exception of the light fixture box (see below), which I measured pretty carefully, but did not end up being in the right spot on the sheet.
It took us roughly 2 hours, not counting the 3 small pieces, which I did tonight.
Yeah, it looks pretty terrible, but it will get patched, and it'll be just fine.
I'm really glad that the drywall sheets were the "Ultralight" ones. I had originally ordered just regular sheets, and they had sent me these, so I used them on the ceiling. I'd say that they're around 20-30% lighter.
I just googled it, and I was right! 30% lighter! Sheetrock Brand UltraLight Panels.