Wolrd 66 is another wiki travel guide, which allows users to freely edit and add text information (see Wikitravel). Unlike Wikitravel, however, World 66 does not feel like Wikipedia at all, and appears to be pre-loaded with text (Wikitravel has quite a few empty pages). World 66 also includes a useful Accommodation search facility.
The MyWorld66 tab takes you to a Travel Tools list that includes the cool Visited Countries map making tool that I previously blogged on my Geography for Travelers site. In addition to world countries, however, the tools allow you to make maps of US states and Canadian provinces.
Registering with the World66 website gives you "a homepage for your maps and for the other travel tools and your name will appear with the articles you write."
There is also a mobile phone version of the website (world66.com/alt/xhtml) and destination guides are available as .pdf files and in the repligo mobile phone format.