A Listing of Top 5 Search Engines in the United States (The Majors) by Rank

Google
Free Submit: http://www.google.com/addurl/

Yahoo! Search
Free Submit: http://submit.search.yahoo.com/free/request/

MSN Live Search
Free Submit: http://search.msn.com/docs/submit.aspx

AOL Search - Powered by Google
Submit: https://adwords.google.com/select/

Ask - Powered by Teoma
FAQs: http://static.wc.ask.com/en/docs/about/webmasters.shtml#18