Like you, I've been wondering what "socialism for the 21st century" might look like. Here's a good overview of what it looks like so far in South America. It's especially interesting for its insight into what it might mean for the relations between Venezuela and its English-speaking, pro-"socialist" neighbor Guyana. The author is Odeen Ishmael, Guyanese ambassador in Caracas. Socialist Ideology Takes New Roots in South America
Also check out the other articles on this site.