During the time I spent researching my trips to France I came across many interesting websites. I cannot vouch for them all, but if I stayed at one of the properties listed, I noted it.  I hope this information is helpful to you.
Paris Lodging
Transportation/Maps
General
Personal Web Pages
Outside Paris
www.parisbandb.com
www.hotel-du-champ-de-mars.com
www.paris.shuttle-airport.com  Airport shuttle, CDG-Paris
www.paris.org/Metro    Metro/bus/RER maps
www.sncf.fr/indexe.htm
www.subwaynavigator.com   Chart your course
www.orient-expresstrains.com
www.thalys.com/uk/ind_uk.htm
www.fodors.com/forums   An excellent traveler bulletin board
www.parisapied.com
www.onecity.com/paris
http://ourworld.compuserve.com/homepages/pariswalking
www.pariswater.com
http://cordonbleu.net
www.ricksteves.com
http://finance.yahoo.com/m5?a=1&s=USD&t=FRF   Currency conversion
www.image-ination.com/test_maker/convert.html   Convert temperature, gallons, inches, etc
www.mileageworkshop.com
www.intermusees.com   Paris Museum Pass
www.logis-de-france.fr/us/index.htm
www.chateauandcountry.com
www.bbfrance.com
www.welcometouraine.com
http://members.aol.com/ChatLaVout/index.htm
www.loire.net
www.karenbrown.com/france
http://giverny.org
www.le-vieux-manoir.com
www.chateaudejonvilliers.com/index.htm
http://tourevasion.com/anglais/anglais.htm
http://geocities.com/dhfsbf/fodorite/fodor.htm
www.fortunecity.com/oasis/paris/200/complet_eng.htm
www.thetravelzine.com