I have just finished work on level 7, and while I do need to test it, it's pretty much done. Besides a few more overworld screens, level 8, Ganon's Tower, and some other secrets, the quest's development is almost done. (Of course I will still need to beta test it to get rid of those last few bugs.) I expect to have it up on the database by late April or early May.
I'll be updating the project page with some new screenshots soon.