There are many websites written by people who have done RTWs. Some of my favorites:

http://home.comcast.net/~gardyloo/
http://www.ourlifejourney.com/rtw_2001.htm
http://blogs.bootsnall.com/theglobaltrip/
My absolute favorite -- the photo slide shows make you want to pack your bag and go this minute!

There are many other blogs by RTW'ers at:
http://www.bootsnall.com/rtw/05-01/rtw-blogs.html

A couple of my other favorites I lost when I switched computers, unfortunately, but there are many great ones and hopefully others can direct you to them.

For planning help, I'd start with:
http://gc.kls2.com/
http://www.smartertravel.com/travel-...tml?id=1245021
http://www.bootsnall.com/tripplanner.shtml
Also, I'd go the trip report forum and search on RTW to get trip reports and tips from others.

Good luck -- and keep us updated!