Thinking about this some more, the way I see it there are (at least) three elements to this:-
1.) Buying and selling geodomains
2.) Developing geo domains and geo site content
3.) Making money from geo sites
I'm not sure if its worth having a separate geo domain section for buying and selling geodomains - the existing section seems fine to me.
The difficult bit is developing and monetising geodomains effectively/ profitably. Thats where we need a distinct section because of the unique problems of development of geo and travel sites.