Information Sites.

• All major passes in Europe An excellent site for all climbing/downhill oriented cyclists, or for those who wanna avoid the hills. Good for route planning in Europe. Multiligual.
• Andrea Caranti's Site. Lots of good information about cycling in Europe.
• Biketrip.org Big site with both unusual and useful info.
• DMOZ A huge directory, with many good links to information, private sites etc.
• The Horizon A Dutch site with loads of good info about traveling.
• Virrcom bikelinks Lots of links.
• Cykelsemester. A Swedish Site with good links.
• Bikeaccess General info about touring.
• Cheryl Kline's two info sites about cycling Homestead.com/bicycletouring and Homestead.com/travelinhobo
• Cyclesearch A good site with interesting links, well put in order by continent.
• A huge linklist about cycling in South America

Online Resources.  

• Calle.com Find the location of every little village in the world! Amazing!
• Cybercaptive Don't know where to find online services next time? No problem - try out this search engine and you'll find internet cafés in most corners of the world.
• Another search engine which helps you locating internet cafés, hostels, maps etc.
• Maps and Info Excellent site if you want background info about any country. Pretty good maps as well.
• Tibet Maps Some good, highly detailed maps of Tibet, ready for downloading.
• Trailblazer A selection of guidebooks, not the Lonely Planet bullshit. Usually I find guide books unnecessary, but had some good help from the Asia Overland for general planning.