This is not what the OP had in mind I think, but this is something I posted somewhere -- maybe in this thread.
I believe there should be a gil-based way to donate, because there are many FFXI players who cannot afford to donate as much as they'd either probably like or have necessary to really help out.
My idea would be that, once (and, frankly, if) everything is stable enough that the game can continue, Square-Enix partners with a number of other companies, and an in-game event is created where players can donate gil to Moogles (say, even make this part of the 9th Anniversary, which would, if this thing goes a month or six weeks, effectively BE the re-launch) or buy special items (be they furnishings or semi-desireable lower-level gear), with the gil proceeds being put in to a pot, where X amount of gil means a donation to the relevant charities.