If they do implement an auction house the developers at ffxiah.com will have to cater their data collecting methods to whatever interface FFXIV has. I don't know how they collect data, but it seems like there will probably be a long development period as they figure out the system works.
"It's a magical world, Hobbes ol' buddy. Lets go exploring."
Just for clarification, I bot, sell gil, buy gil, MPK, party naked through the dunes, power level, play as a Ranger, quit when they nerf it and complain, play as a Beastmaster, quit when then nerf it and complain, make posts for and against RMT, monopolize NMs, create elitist groups, run casinos, steal gil, hack accounts, and stare at you awkwardly with my left eye.