U.S. Citizenship & Immigration Services (CIS):

CIS Home Page
http://uscis.gov/graphics/index.htm

CIS Case Status Update (for specific case numbers) https://egov.immigration.gov/cris/jsps/index.jsp

CIS General Processing Times
https://egov.immigration.gov/cris/jsps/index.jsp

Immigration Forms and Fees
http://uscis.gov/graphics/formsfee/forms/index.htm

U.S. Department of Labor:

Backlog Processing Center for Labor Certification Applications for Permanent and Reduction in Recruitment (RIR) cases
http://ows.doleta.gov/foreign/times.asp

PERM cases (as of March 28, 2005)
http://www.plc.doleta.gov/eta_start.cfm

U.S. Department of State:

List of U.S. Embassies and Consulates Worldwide
http://travel.state.gov/travel/tips/embassies/embassies_1214.html

Consular Wait Times for Visa Applications
http://travel.state.gov/visa/temp/wait/tempvisitors_wait.php

Visa Bulletin (Immigrant Visa Availability)
http://travel.state.gov/visa/frvi/bulletin/bulletin_1360.html

U.S. Department of State Consular Forms
http://www.state.gov/m/a/dir/c4456.htm

Visa Fees and Reciprocity Tables
http://travel.state.gov/visa/frvi/fees/fees_1341.html

Passport Applications (U.S. citizens only)
http://iafdb.travel.state.gov/ (general application information)
http://travel.state.gov/passport/about/agencies/agencies_913.html (travel within 14 days)
http://travel.state.gov/passport/about/agencies/agencies_901.html (Seattle Passport Agency)