Surely Biden isn't going too!
From WikiPedia: http://en.wikipedia.org/wiki/United_States_presidential_line_of_succession
Current order
This is a list of the current presidential line of succession, as specified by the United States Constitution and the Presidential Succession Act of 1947 (3 U.S.C. § 19) and subsequent amendments to include newly created cabinet officers.
# Office Current Officer
1 Vice President Joe Biden
2 Speaker of the House Nancy Pelosi
3 President pro tempore of the Senate Daniel Inouye
4 Secretary of State Hillary Rodham Clinton
5 Secretary of the Treasury Timothy Geithner
6 Secretary of Defense Robert Gates
7 Attorney General Eric Holder
8 Secretary of the Interior Ken Salazar
9 Secretary of Agriculture Tom Vilsack
10 Secretary of Commerce Gary Locke
11 Secretary of Labor Hilda Solis
12 Secretary of Health and Human Services Kathleen Sebelius
13 Secretary of Housing and Urban Development Shaun Donovan
14 Secretary of Transportation Ray LaHood
15 Secretary of Energy Steven Chu
16 Secretary of Education Arne Duncan
17 Secretary of Veterans Affairs Eric Shinseki
18 Secretary of Homeland Security Janet Napolitano