Are you still waiting for the library ? I also be interested by this kind of library.
I think you better ask to get in touch with the "user" to speed up things.However, one of our users contacted us, offering to submit a project where he wrote practically the entire library on his own, with high level of compatibility with the previous prototypes. He pointed out that this library could help all of those who relied on earlier Advanced Ethernet Library, so they may continue with their work. It will be open-source, so you can do some adjustments if needed.
The library has been promised at least 3 times in this thread. Those kind of "unkeep promises" are not really confidence builders...