I personally don't live the nomadic lifestyle myself, but my particular reason is because I like to come back to a home base or place to process all my experiences and share them once I'm on familiar ground. I still feel, though, that I have a lot in common with travel nomads and like sharing information with them. In my case, I may have done at least some of what they have done, but stretched it out in little bits over a long period of time. One such experience was seeing a mime on the streets of Bogotá, Colombia during a trip to a food festival there.
Here are links to more sites that discuss or refer to the travel nomad lifestyle:
The 4-Hour Workweek by Tim Ferriss is one book that discusses in detail the freedom to work from anywhere in the world and choose one's own schedule. Tim's blog on this subject is called The 4-Hour Workweek Blog.
Move Builder, a company that specializes in relocation, also has a webpage listing travel blogs that describe the lives of several travel nomads.