President Joe Biden?

ok, i'm not an expert on constitutional law, but i had a thought the other morning that puzzles me.
i seem to remember from Dr. Lynch's or Mr. Lobo's social studies classes that the real job of the Vice President is to be President of the US Senate. And be first in line of succession.
So, the US Congress is in session now, working to pass the spending authorizations that president-elect Obama has requested. And it is the new Senate. So Joe Biden is working in his new role.
So does that mean that if President Bush were to become incapacitated in the next few days or even die, that Joe Biden would become the President until the inauguration?

Social Skills, Coping Mechanisms: They're Proper Manners

Being from the generation that rejected social conventions as unnatural constraints on "real" human interaction it's interesting as a grandfather to discover that our parents had it right all along. Manners matter. Check out the link from the title.