I’m not a huge fan these days of the Nolan chart and similar quiz-based ideology measures; however, Tim Lambert has been compiling bloggers’ results on the Political Compass test. As he points out, it’s hardly a scientific sample of bloggers, so take it with a grain of salt.
An interesting outstanding question is whether the Compass is a particularly valid measure of ideology. Their FAQ seems to preclude any independent test of this proposition, as they claim copyright on the items—and I believe that such a copyight is valid, given the widespread use of copyrighted scale questions in psychometry.