For those who could get it to work, how much latency were you facing? When I tried it, I got a black screen for the longest time and my tester and I deduced that this netplay wasn't suitable for high latency... or is it?
Would playing this at 30-40ms latency be possible?
That would give you 2 (maybe even 1?) delay, which is very playable. 4 delay and above are really bad, but honestly, this PS2 netplay is a lot better than I'd imagined.
Also, if you're hosting, someone has to connect within 1-2 mins or it won't work.
Also, after every session (waiting for someone to connect, playing together, or getting an error), restart the emulator completely. It's still a work in progress thing.