http://online.wsj.com/article/SB124650399438184235.html

We have no political affiliations and no political purpose except to make the workings of Congress as transparent as possible. We expect this resource to be useful to journalists, researchers, lobbyists and current and would-be staffers - as well as regular citizens who simply want to know how their representatives spend public money.
http://www.legistorm.com/

Top Congressional Travelers, 2005-2008
Rank/ Member of Congress/ Total Amount/ Number of Trips
1 John Conyers Jr. (D-Mich) $94,391 - 76
2 Collin C. Peterson (D-Minn) $62,670 - 66
3 Joe Barton (R-Texas) $110,946 - 62
4 Saxby Chambliss (R-Ga) $113,959 - 61
5 Larry Craig (R-Idaho) $68,085 - 56
6 Hillary Clinton (D-NY) $87,549 - 50
7 Don Young (R-Alaska) $71,144 - 47
8 John Lewis (D-Ga) $29,455 - 44
9 Bob Goodlatte (R-Va) $62,637 - 43
9 Bill Thomas (R-Calif) $34,228 - 43