Well, Sony would prefer people not use the adapters as they are completely unlicensed for use with the PS3- it would not surprise me to see some sort of blocker code in the firmware updates.
In the end you may want to considera new steering wheel such as the Logitech Gran Turismo sets. They are pricier but they are also licensed.They have a new steering wheel designed for the PS3 around the same time as the release of Gran Turismo 5: Prologue- it is compatible with the PS2 driving games as well, from reports I have seen.