Dashpoet

This colorful, happy design from dashpoet.com is a "map" of links to children's websites. Link

Dashpoet.com features a number of "original internet maps" all using bright colors and simple design. Maps include news, travel, shopping, football, museums, music and more.

Mapping the Digital Divide in Africa

In 2005 Acacia published an atlas full of fantastic maps on this topic. Acacia is an information and communication technology initative in sub-Saharan Africa. The map shown here is a measure of the ICT Opportunity Index, which combines "ITU's Digital Access Index and Orbicom's Monitoring the Digital Divide/Infostate conceptual framework and model."
Page 16 also has a great map on the affordability of the internet in Africa.

I'd love to see this updated - it's the most comprehensive mapping of internet and telephony infrastructure and access that I've seen.

TouchGraph

TouchGraph is a free Java application focused on visualization of web-based information and designed to help people explore the connections between related websites.

The TouchGraph Google Browser reveals the network of connectivity between websites, as reported by Google's database of related sites.