Links to some relevant sites you might find interesting:

http://www.janandbillhaueisen.com - Completed The Loop in 1999.

http://www.greatloop.com - The America's Great Loop Cruisers' Association (AGLCA)

http://www.mcdonoughmarine.com - McDonough Marine (maps, mileages, & more; click on Tools)

http://www.cruisingguide.com/fredmyers/index.html - Fred Myers Cruising Guides + more Links

http://chartmaker.ncd.noaa.gov/pod/Pod.htm - NOAA Print on demand charts

http://water.sam.usace.army.mil/ - US Army CofE, Mobile District (lock info)

http://www.ndbc.noaa.gov/station_page.phtml?station=42039 - Real time sea conditions off Pensacola

http://www.ndbc.noaa.gov/station_page.phtml?station=42036 - Sea conditions NW of Tampa

http://www.grandexcursion.com - Grand Excursion 2004; 150th anniversary re-enactment of President Millard Fillmore's excursion up the Mississippi from the Quad Cities (IL & IA) to the Twin Cities (MN).

http://www.calypsopoet.net - From Arkansas; recently completed the Loop