I see today that the Lab has published the list of regions in ADITI where the new Pathfinding functions are being tested.
These SLURL’s may or may not work when you click them. It depends on whether you have set up the secondlife:\\ protocol in your browser. The easy way yo get to these SLURL’s is to log into ADITI and paste the SLURL into the location window at the top of the viewer.
Obviously, I think, you can use the World Map to find the PathTest regions.