Legistorm is a great site to see privately paid for travel by members of Congress and their staffs. It includes Google maps and has additional links to bios, staff salaries, and personal finances. Can search by member, organization, or key word search. For example “Housing” as a key word works.
Privately Paid for Travel by Members of Oregon delegation:
The Sunlight Foundation has an interesting story about progress being made by Carl Malamaud to free federal congressional hearings video from CSPAN control and back into public domain.
Direct information about video hearings project progress can be found at Internet Archive HERE; a direct link to a Google Video with Malmaud explaining the background of his efforts to make federal Congressional hearings available to the public is HERE. O'Reilly Radar (not that O'Reilly) adds details about additional Malamaud open government projects, including release of historical legal opinions.