Here's a partial list: From Cnet
• The Joint Congressional Committee on Inaugural Ceremonies, which is in charge of all the inaugural activities at the Capitol, will stream the entire event at its Web site, complete with closed captioning. The site has a wealth of information about what happens on Inauguration Day, including a handful of inaugural videos dating back to President Dwight Eisenhower's 1957 swearing-in ceremony, as well as videos of presidential luncheons dating back to the inauguration of John Kennedy. (It also reveals, for those interested, the recipe for Obama's luncheon meal, which features a main course of pheasant and duck served with sour cherry chutney.)
• Our sister site CBS News will have day-long live coverage January 20 on TV and the Web, starting at 7 a.m. EDT. Katie Couric will also host a special Webcast that night with reporters and punditry, for which viewers can submit questions.
• CBS streaming coverage will also be Webcast on Joost's Everything Obama page, which also features interviews, campaign highlights, and satire clips.
• MSNBC will be live streaming the event on its home page and politics section, and visitors can embed the video into their own sites. Its inauguration page also features videos of inaugurations from decades past.
• Fox News will provide live streaming coverage via Hulu beginning at noon for about two hours. After the live stream, Hulu will provide on-demand access to the ceremony. The live stream is embeddable, as is an inauguration countdown from Hulu. The video site's Obama Presidency page also features related content like speeches, commentary, satire, and past inaugural speeches.
• C-SPAN will debut its Inauguration Hub on January 20, featuring an online "control room"--a multichannel grid designed by Mogulus with Webcasts of inauguration activities. Visitors will be able to choose from one of four live feeds featuring events like the swearing in at the Capitol, the parade, and a number of inaugural balls.
• CNN is partnering with Facebook to provide live streaming of the swearing in and Obama's speech. Viewers can "RSVP" for the event on Facebook, and as they watch, they will be able to provide status updates with their thoughts on the events. A Facebook window on the CNN.com Live channel will show viewers their friends' relevant status updates.
• Current TV and Twitter are teaming up, as they did during the election, to add real-time tweets to Current's broadcast and Webcast of the swearing in, which starts at 11:30 a.m. EDT and will be replayed throughout the day.
• The New York Times, the AP's online video network, and the Online NewsHour will also live stream inauguration coverage.
Once Obama is sworn in, he'll be party hopping through Washington that night. The Presidential Inauguration Committee has promised to Webcast some of the official inaugural balls--though there are plenty of unofficial parties, including some hosted by tech companies.
http://edition.cnn.com/2009/TECH/01/16/inauguration.online/index.html