As you know Kim, I think you are doing a fantastic job in your rescue work. It is quite easily understandable that you can only take in so many kitties.
Here's a little something that might help you in finding new homes for your babies.
When I went to a foster home to get a kitty, the woman had no application for me to fill out or questionaire. We were invited in to sit at a table and then she proceeded to ask us questions.
After about half an hour, she introduced us to each foster cat and observed how we interacted with each one. Then we sat at the table again for about another half hour just talking like we were old friends. After about an hour we decided to take Katie as she was the one who came to us. To make a long story short, the woman said that she felt very comfortable with us, cause when she was asking questions, she watched for any kind of body language, like fidgeting, no eye contact and any kind of discomfort. She said there was none of that on my part, that's why she felt comfortable letting us take Katie home with us that night.
After we brought Katie home, she would call every 2 or three days to see how things were going. She even had a volunteer that we had met, make a house call after, about 2 weeks of having Katie. I didn't know that any of this was going to happen but I'm glad it did, cause it made me feel good to know that they weren't giving these cats to just anyone who came along.

Good luck to you my dear and believe me when I say, that if I lived closer, I would take little Newton in a hearbeat. He has always been my favorite. (But don't tell the others that ok.)
They are all precious.