It probably sounds like I'm not sympathetic, but actually I am. I had it bad in the cross-disciplinary early days of Internet research when I wrote my dissertation. It was hard to figure out who to read, what to cite, and where to follow-up. Hard, but not impossible, and so I am sympathetic. (But possibly the relatively powerless position of grad student made me more concerned about this process than tenured physics professors?)
Eszter at Crooked Timber has a nice reading list for social network studies. And here's the link to the infamous social network paper by physicists, on the Eurovision song contest -- always an interesting subject! Even more entertaining, from their abstract: "We investigate the complex relationships between countries in the Eurovision Song Contest, by recasting past voting data in terms of a dynamical network. Despite the British tendency to feel distant from Europe, our analysis shows that the U.K. is remarkably compatible, or ‘in tune’, with other European countries. Equally surprising is our finding that some other core countries, most notably France, are significantly ‘out of tune’ with the rest of Europe."
I'd guess the physicists are British.