Anyone know who "Second Round Names LLC" is?

As for the registrar you mentioned:

The link on the left links to the NetworkSolutions.com website.

Network Solutions is a subsidiary of Web.com.

So the person used SnapNames to catch it. Why would NetSol be the registrar? Does NetSol own SnapNames nowadays? (sort of like how names caught by DropCatch are always registered with the same registrar?).

NetSol and SnapNames are both part of the Web.com Group. So it's a 'web' of companies, really. As is always the case with dropcatchers.

Snapnames and Namejet are both owned by Netsol or Web. So you have to use Netsol for 60 days. Plus, if you don't pay $12 for whois, you'll be getting more phone calls than if you registered a .us domain name.

I can't imagine what happens if they catch a .us name for you...your phone company might cancel your plan for too many inbound calls in a day!