Probe and read work. Erase fails and write requires erase to test. The problems could be to do with the (soldered) flash chip requiring VPP to write. I haven't tested the hardware any further yet, but I thought you might like this log to show that it does work this much. :)
I have two of these cards, this one has a soldered flash chip, the other has a socket. I haven't tested the socketed one yet...