Al Jazeera English has live coverage streaming here.
Also might be interesting, when there's a chance to go through them (which I haven't had yet), wikileaks just released a whole bunch of Cairo cables, indexed here.
UPDATE: Hillary Clinton: "People in the Middle East, like people everywhere, want to have a role in the decisions that will shape their lives." Meanwhile, the NDP headquarters are on fire.
UPDATE II: The moment PZ Myers posts something about how stupid Egyptians are for praying in the middle of a riot, I'll let you know.
UPDATE III: The NDP headquarters are still on fire, and were extensively looted already. Protesters are setting up makeshift barricades on the streets and, according to Al Jazeera's reporters, seem to still be pretty much in control of central Cairo at least.
UPDATE IV: Speaking as an American the idea that the police and the military might not be serving the same interests is very difficult for me to grasp. In comments Jack points out that the military is "booted up with conscripts," which seems like it might be significant, but I don't know nearly enough to understand the situation.
Right now reports seem to conflict. There is some indication that there have been gunfights between military and police. AJE is reporting in turns that the military was greeted with cheers as they rode through saluting the protesters or that the military actually fired on crowds of protesters; AJE themselves seem to be confused about it. It may be that different things are happening in different places.
As I write various people on AJE are talking about how the military "has been shielded from politics for at least thirty years," which I'm not quite sure what that means; mentioning also that they are significantly smaller than the internal police forces; and speculating about military leaders taking over if Mubarak steps down or is deposed; they also point out that the military has issued no statement about whether they're backing the government or the people.
I don't know anything about this aspect of the situation, absolutely zip, and am kind of at a loss of where to look to learn more.
UPDATE V: There has been some fear for the Egyptian Antiquities Museum, which is, if I understand correctly, pretty much right across the street from the NDP headquarters. At this point, protesters are apparently forming a human shield around it to prevent looting and to try to keep the fire from spreading to it. Which is damned impressive if you ask me.
UPDATE VI: A reporter on the street is showing a handful of live ammo shells she's been given by protesters, who picked them up off the street, so that seems to be confirmation that live ammo has been fired. She also says many people have pointed out to her the "MADE IN THE USA" stamps on the tear gas canisters fired on protesters.
UPDATE VII: Robert Gibbs's favorite word is "monitoring." He uses it whenever he would otherwise be required to answer a question.
UPDATE VIII: No word from or sign of Mubarak, no one seems to know where he is. Do we feel like he's fleeing?
UPDATE IX: Prominent businessmen have been "boarding private jets and leaving."
UPDATE X: One thing AJE keeps emphasizing is that there is no real leader of the protests, that it's the people themselves making themselves heard.
UPDATE XI: Hah! AJE tells me Reuters just reported that Egypt is in "Mubarak's safe hands," and then says "If this is what we're seeing, what does that say about Mubarak's safe hands?"
UPDATE XII: Mubarak has given an address on television, saying basically that the protests have suppressed people's desires for more of his rule, or whatever it is that he means when he says "democracy." He doesn't seem to think he's lost power.