A number of internship opportunities start their process early. Keep an eye out for great internships with early deadlines and get your summer figured out before the snow flies!
Looking for an Accounting position? Many of those firms have early deadlines. Head over to the Accounting page for more information.
Abbott, Inc (Pharmaceutical Company) Lake County, IL Positions in IT, Accounting, and Science - Currently accepting applications for summer www.abbott.com (click on "Career Search - then look for Internships).
American Century Investments (Summer IT and Finance Internship), Kansas City, MO Currently accepting applications
http://www.americancentury.com/join/internship/index.jsp
Arthur J. Gallagher (Insurance Brokering) , Various locations : accepting applications www.ajg.com 
- Stephanie at her summer internship with John Deere
Boeing, Inc (Aerospace/Airplane), St. Louis, MO and elsewhere - Opportunities in Business Finance and Accounting: Summer 2009 opportunities listed: https://jobs.boeing.com/JobSeeker/JobSearch
Burston-Marsteller , Marketing and Advocacy Group in Chicago, Washington DC, NY, San Francisco, LA, Dallas and more: Deadline is February 20 2009. http://www.burson-marsteller.com/Careers/Internships/Pages/default.aspx
C-Span (Political Journalism) - Opportunities in political research, writing, production, sales, etc, Washington DC: Summer 2009 internships listed http://www.c-span.org/About/Employment.aspx click on job opportunities)
Ford Company , in or near Detroit, MI. Opportunities in Finance, Marketing, IT, Purchasing, more: Summer 2008 Internships already listed: http://www.mycareer.ford.com/
John Deere (Moline, IL) Opportunities in Accounting, Marketing, and more: You can apply now! http://www.deere.com/en_US/careers/college/internships.html
Johnson & Johnson (Health products and Pharmaceuticals) , Cincinatti, OH and elsewhere. Opportunities in Finance, IT and more. Applications currently being accepted. www.jnj.com/careers/global/undergraduate/internships_co-ops/index.htm
KMOX (St. Louis Radio Station - Cardinals flagship station Opportunities in the Sports Dept, Web Design and Marketing/Promotions): Now accepting applications for summer. http://www.kmox.com/pages/7778.php?
Koch Industries (Opportunities available in IT, Accounting, Marketing and more): http://www.kochcareers.com/college_recruiting/careers.htm
Liz Claiborne, Inc (Cosmetics) - Opportunities in IT, PR, Sales, Retail, Information Systems, and Design, New York City: Summer 2008 Positions Listed: http://jobs-lizclaiborne.icims.com/lizclaiborne_jobs/jobs/candidate/intro.jsp (search for Internships)
Merck, Inc (Pharmaceutical Company - Opportunities in Finance, Research and IT) , Various locations: Positions for Summer listed http://www.merck.com/careers/search_jobs/university.html
Muscular Dystrophy Association Summer Internship Program - Opportunities in PR/Communication, Journalism, more. Paid. Kansas City, Tulsa, Chicago, NYC, and many more locations. Applications for summer now accepted: http://www.mdainternships.org/description/
NORC - National Research Opinion Center - Paid Social Science research position. Chicago. Deadline is Feb. 29. International students can apply: http://www.norc.org/Careers/Summer+Internship/
Phillip Morris (Tobacco Company) - Opportunities in Branding, Finance, and Supply Chain Management, Richmond, VA: Positions currently listed http://www.cantbeattheexperience.com/cbte/cms/en/
Presidential Classroom (Civic Education for High School Students - Washington DC) - Currently hiring Intern instructors and Headquarter internship: www.presidentialclassroom.org/content/instructors_interns/internships.asp
Principal Financial Services , Des Moines, IA, Opportunities in IT, Finance, Marketing, and HR: Summer Internship Information available: http://www.principal.com/careers/intern_program.htm
RCM McGradrey (Nationwide Accounting Firm): Summer Auditing Positions now available in Kansas City, Davenport, and many other locations: http://www.rsmmcgladrey.com/Careers/New-University-Candidates/Internships/
National Aeronautics and Space Museum (various positions - stipend provided) Washington DC: Applications accepted Jan 15 - Feb. 15: www.nasm.si.edu/education/pubs/intern.pdf
Summer MU Research Programs for Non-MU students Summer 2008 information listed http://www.lsurop.missouri.edu/summerOther/index.htm
Other Research Experiences for Undergraduates (Paid, Room/board provided) positions now available: All throughout the country and international too. www.nsf.gov/crssprgm/reu/reu_search.cfm
RISE (Research Internships in the Science of the Environment): http://programs.astate.edu/rise/
Schwan's Foods (Food Delivery) , Nationwide - Opportunities in Engineering, R & D, Management Development: Summer 2008 Internships listed: http://www.schwansjobs.apply2jobs.com/
Sigma-Aldrich (Chemical Manufacturer) , St. Louis - Opportunities in Chemistry, Biology, Business and Engineering. Applications currently being accepted. http://sh.webhire.com/Public/310/search.htm
Swiss, RE - Insurance and ReInsurance (Global locations - including Kansas City) - Deadline 1/22: www.swissre.com/pws/careers/interns_swissre/interns_swissre.html
US Golf Association - Paid internships all over the country, including in Missouri (Chesterfield and Jefferson City) in Golf Admin: Applications now being accepted.
www.usga.org/jobs/internships/golf_administration/opportunities_by_state/
US Steel - Positions in Marketing and more (Chicago). Applications currently being accepted: ussteel.oats.hrsmart.com/cgi-bin/a/highlightjob.cgi?jobid=1342
Walt Disney Company , New York, Florida and California, Opportunities in Business/Finance, Biology, Marketing, "Golf Operations", more: Summer Internships available: https://disney.recruitmax.com//main/careerportal/Job_List.cfm?
Washington International Trade Association (DC - Opportunities for students interested in this area): Summer applications being accepted now. http://www.wita.org/index.php?tg=articles&topics=36