Gretchen over at XBiz World really liked the idea I gave them, but Alec says they're a little too busy to take on more projects. So, I'm going to pass this on to anyone else that might be interested.
In the music industry, there are a few business directories that have been around for a few years. My company is listed is all of them and I have to say, I do get a good chunk of business from them.
Indie Bible
http://www.theindiebible.com
Musician's Atlas
http://www.musiciansatlas.com/pages/atlas-main.asp
My idea, or suggestion, is for someone to create a business directory like these for the online adult industry. Revenue would be generated through sales of the directory and advertisers.