I'm the owner and lead dev of FFXIV Classic (a 1.0 emulator). Talked with a friend who was a big dev on DSP (FFXI emulator) and it sparked an interest in trying to get FFXI PS2 working again.
Haven't done much PS2 reverse engineering but was looking around the POL installer library to see if I can patch out DNAS and let the installer continue passed the verification.
Sadly the online signatures out there now are all for DNAS2. XI (at least the original installer on the first release of FFXI in US/Can) uses DNAS1 (functions are prefixed sceDNAS1____). Once my friend sends me the isos for the beta version I might make more progress as they had left the debug symbols in there.