According to The Register, this time out of Berkeley though the project has been around for half a year. Still, this sounds like the best effort yet. It does require Java but I don’t see that as much more of a barrier than the distributed measurement tools that use a browser extension. And the researchers definitely seem to be taking advantage of what using Java applets provides, incorporating DNS tests, not just straight up traffic monitoring.
I have to ask, though, where are the results from such efforts? Not just the project out of Berkeley, but any or all such projects looking to figure out what the empirical states of networks are. It isn’t enough to build the tools, there has to be a consequent focus on results. Hopefully, with more such projects, one of the emergent benefits will be a greater chance of producing useful empirical data.