I wasn't familiar with the Global Disaster Alert and Coordination System but they've got a pretty fascinating page put together as well, including damage risks assessments and more maps.
Speaking of risks, this isn't directly related to the earthquake but it shows areas of concern with regard to global warming related flooding in Lima. If the tsunami warnings come true, this is probably a fair projection of the areas of impact. (via this map site)
As far as I can tell, the best direct source for Peruvian news is a newspaper site called El Comercio. Folks are leaving comments and reactions there (in Spanish of course). The front page has extensive coverage and a few videos and I see they're soliciting reader media so we may see some photos and video from the street. (I made the mistake of hitting the refresh page and now the site is hung up. No doubt some heavy traffic headed their way.) ADDING: They've added a Twitter link to receive updates. Great idea and a nice reminder to check out Twittervision. This will probably only work while the news is breaking but you can literally watch the world talking about the earthquake. Fascinating.
I'm checking this Lima blogger periodically for updates. Speaking of Peruvian bloggers, can someone explain what this one is saying about the light in the sky? "Sali a la calle y vi el cielo iluminado, como si un rayo hubiera partido la noche."
In checking YouTube I found this video of an earthquake in Peru from 1970. I'm not clear if that's real footage or some kind of dramatization, but I did find some details in Wikipedia. "Combined with a resultant landslide, it was the most catastrophic natural disaster ever recorded in the history of Peru." Comparisons will likely be forthcoming regardless of the outcome of today's event. At the very least it put the public panic in context. ADDING: The more I poke around, the more it appears that Peru has a lot of familiarity with big earthquakes. The article on MSNBC.com now mentions, "The last time a quake of magnitude 7.0 or larger struck Peru's central coast was in 1974 when a magnitude 7.6 hit in October followed by a 7.2 a month later." And there was the one in 2005 and the one in 2001 (this model of the resulting tsunami is worth seeing).
By the way, I've been using Babelfish to help fill in on translation where my memory of Spanish class is failing. Results are mixed.
Great coverage at Cronica Viva.
ONE MORE UPDATE: "One of the most peculiar things is that in spite of the intense movement, the connection to Internet continued working. Neither the MSN Messenger nor Skype succumbed." (That's in Bablefish's words with a tiny edit.) The blogger tells the story of talking to people in Santiago, Chile via IM who are trying to reach family in Peru and he was able to help relay their message.