I thought I would take a minute and describe what the next few days will be like for Bruce. Starting in the wee hours of the morning, they will head back up through the icefall. They do this at that time of day because that's when it's the coldest, and therefore the icefall is the most stable. (I have a hard time with this, because the icefall seems so scary to me even in the daytime -- I can't even imagine doing it by headlamp, but I can see the wisdom. The avalanche that killed a sherpa in the icefall a week ago occurred at mid-morning.)
They will continue on to Camp 2 (bypassing Camp 1) the first day and rest there for two nights. Then they'll ascend to Camp 3, which at roughly 24,000 feet is as high as they have been so far and higher than any point in the world outside of the Himalayas. My understanding is that they will begin using supplemental oxygen at Camp 3 -- sleep with it that night -- and will continue using it from that point on, until after they summit and get back down to Camp 2.
The next day they'll climb to Camp 4, located on the South Col at approx. 26,000 feet. This is the start of what's known as the "death zone." This refers to the fact that it is at this height that the body literally starts to deteriorate, no matter what, even with supplemental oxygen . That is why they will keep their stay above 8000 meters to a minimum.
Very early on Day 5 (sometime between midnight and 2:00 a.m.) they will begin their final push to the summit. If the weather and the mountain and their physical bodies allow it, they should be standing on the highest point on the planet sometime later that morning. At that point they will have climbed just over two vertical miles from Base Camp. They will limit their time on the summit to 15 - 30 minutes -- just enough time for photos and to take it all in -- and then head back down to Camp 4. They will spend one night there, then descend to Camp 2 for one night, then back to Base Camp. Seven days total if everything goes as planned.
Bruce will phone again tonight and I'll post again if any of this has changed. In the meantime he directed me to the blog of one of the other climbers in his group, which has a picture of Bruce in the icefall. He's the one on top with the red gloves.