Much of the Senate-related information you could need is posted on the Senate's Web site (Senate.gov), including a page listing all the Presidential appointments for government positions that have been proposed, confirmed, withdrawn, etc.
For more information, see the separate entry for "Congress." For general questions, call the Senate (202-224-3121) entry. For questions about Senate publications, call the Senate Document Room 202-224-7860 or the Legislative Resource Center (formerly the House Document Room) at 202-226-5200.
Rules of Procedure: The GPO posts the Senate Manual, containing "the rules, orders, laws, and resolutions affecting the business of the United States Senate." The Senate Rules Committee also posts the Rules of the Senate. Riddick's Senate Procedure provides precedents for interpreting Senate Rules. For questions, contact the Committee on Rules & Administration (202.224.6352) and/or Senate Parliamentarian's office.
For more about House Rules, see "Points of Order: Congressional Rules Governing the Legislative Process" by John Cannan,
53(2) Law Library Lights 11 (Winter 2010). Two great tips from John Cannan:
- Chairman's marks are often posted on the relevant committee's website; and
- Each party's rules for obtaining committee assignments are generally not available to the public (or even members of the other party).