Palin got 114,697 votes in the 2006 general election. (Undoubtedly she'd draw a lot more in 2010, assuming no major scandals.)
Mike Enzi got 133,710 votes in 2002.
Joe Biden got 135,253 votes that year.
Kent Conrad got 150,146 votes in 2006. (I'm not going to look up Dorgan.)
Tim Johnson drew 167,481 in 2002.
Tom Carper drew 170,567 in 2006.
Bernie Sanders drew 171,638 in 2006.
Jon Tester got 199,845 in 2006.
Well, except in order to be President of the Senate, Palin will have earned about 60 million more votes in 2008.