YouTube partnered with curation startup Storyful to chronicle the most important uploads from the protest on its CitizenTube channel, which will continue to give on-the-ground snapshots of reactions to both Mubarak's address yesterday, when it was anticipated that he would step down but he did not, and today's announcement. Here is one video that was included on the channel today.
Twitter is erupting with comments from all over the world. The Guardian has mapped those tweets coming from the region itself. We've gathered some tweets here to give a snapshot of the reaction, including an observation that someone has already updated Mubarak's Wikipedia article and the New York Times tweeted in Arabic. (The Times was trying to locate sources for a reporter.)