Sollir also has some current work on this site. I'm quite convinced that it can be done flawlessly, but no single project has yet yielded the results that I think would make the game incredible.
The rest of the stuff looks interesting, though it's a bit more swung to the d20 side of things than I'd like. I'd like to keep the job points mechanic, and allow players to purchase abilities in order to give them some degree of customization - I don't think the feat system would work too well, as many of the abilities have vastly different costs.
One could probably convert the job system to d20 fairly easily. That is, you could have use d20 classes as if they were fft jobs. For example you could end up with ranger as a primary job with rogue abilities, monk saves, fighter equipment, and a barbarian movement.