They have found ways around it, but it is a bit complex and not applicable to all DNAS games. We can talk more about the technical specifics of this stuff over at the PS2 site in detail. Feel free to create topics in the PS2 Lounge for now (I still have to resurrect the General Online board there).
As far as us running/experimenting with OpenSpy, it is at the end of a long to do list for me at the moment. If anyone wants to get a jumpstart on it to help me out, feel free You need 2 people with the games, hardware, and time to test and document everything that works, along with server setup and connection guides as an end result. Midnight Club 2 is the top game to test out because it uses GameSpy and does not use DNAS at all.
Current OC server priorities are:
3.) 4x4 Evo
But this might change. I might feel having a more robust Q3 environment is more beneficial, and that could come after PSO in the stacking order.
I'm already numero uno on Dark Helmet's hit list...