Well, I moderated in the Egypt discussion, so I can't post now. Normally, I don't care, but there seems to be a dearth of useful information in there.
Here is a good blog with technical details on how Egypt was withdrawn from the Internet as a whole.
It looks like the BGP routers, about 3,500 of them spread across five major Egyptian ISPs were withdrawn.
What is going to be severely damaging to the Egyptian regime and State as a whole is the impact this will have on the stock and commodities markets whenever they reopen in Egypt. As is the market was ordered closed for Sunday after it fell more than 6% in under 15 minutes the last day it traded. Other regional markets, such as Saudi Arabia, also took decent hits.
And, of course, there are protests in Jordan, Yemen and Albania as well. Jordan is the one that worries me most.