The Nashville Feed reports how social networking programs have helped music sales.

Social networking Web sites, devoted to hosting interactions among members, were once like metaphorical lakes, each stocked with similar fish. Today, these sites have become virtual oceans, filled with millions of species, small recreational boats and massive supertankers.

The popularity of these sites has increased so quickly and dramatically that it’s impossible to say exactly how many total users they draw. The numbers are bigger than many people would suspect, though, and they grow every day.

It’s a comprehensive breakdown.

Check it out here.