Keep in mind, tickets (about 240,000) are free so don't be scammed.
Here is the official inaugural site.
Here is a release on how to get tickets:
WASHINGTON, DC - The Joint Congressional Committee on Inaugural Ceremonies (JCCIC) has issued the following information regarding the availability of tickets for the 56th Presidential Inaugural Ceremony on January 20, 2009:
Tickets to the 56th Inaugural Ceremonies will be provided free of charge and distributed through Members of the 111th Congress. The Joint Congressional Committee on Inaugural Ceremonies does not provide tickets to the public. Members of the public interested in attending the Inaugural Ceremonies should contact their Member of Congress or U.S. Senators to request tickets.
The public should also be aware that no website or other ticket outlet actually has inaugural swearing-in tickets to sell, regardless of what they may claim. Tickets will not be distributed to Congressional offices until the week before the inauguration and will require in-person pick-up.
"Any website or ticket broker claiming that they have inaugural tickets is simply not telling the truth," said Howard Gantman, Staff Director for the Joint Congressional Committee on Inaugural Ceremonies. "Tickets for the swearing-in of President-elect are all provided through members of Congress, and the President-elect and Vice President-elect through the Presidential Inaugural Committee. We urge the public to view any offers of tickets for sale with great skepticism."
The members of the Joint Congressional Committee on Inaugural Ceremonies are: Senator Dianne Feinstein, Chairman; Senator Bob Bennett, Ranking Member of the Senate Rules Committee; Senate Majority Leader Harry Reid; Speaker of the House Nancy Pelosi; House Majority Leader Steny Hoyer; and House Republican Leader John Boehner.
