What we have up on SaveSamoa is an adoption agreement - a contract - not an application (we should put one up, actually). You need references, vet references, where they work - info like that in order to screen people. Eithne's suggestion of checking what they wrote vs. what they say when you talk about it is a good one.

We did this with Billy and Bing. Of course - we ended up with Billy. But we were trying to adopt out almost two year old cats that had been living exclusively outside, and we couldn't foster either.
Have you tried an e-mail campaign to shelters/foster networks in your area to see if anyone can take them in to foster? We have several groups around here that will take in a pregnant momma and socialize the kittens - and get momma adopted out too if it seems like she'd adjust... it just takes a lot of work on the e-mails to find them.
It REALLY helps if you explain that you rescue on your own, but due to current circumstances, you cannot foster any more, and financially you're focused on getting a number of cats spayed/neutered. (A lot of groups don't take the time to READ an e-mail, and just write back some nasty "why'd you let your cat get pregnant" respose, so just nip that in the bud right off the bat).
Go to
http://www.petfinder.com and search on just "cat" in your zip code. All the animals up for adoption show up - pages and pages of them. All cats list an org next to them. Click on one animal associated with each org. Within that page you will find a link to a description of the org - track that down, and figure out how to contact them. They all have an e-mail somewhere. But GET A NOTEBOOK and write down the e-mail address and next to it the name of the org. Almost everyone uses private e-mail addresses, so when they reply, unless you have that list of what e-mail was for what org, it can be really hard to know which org you're talking to - you'll find that a really helpful reference.
Expect 2 - 5 responses within a week or two for every 15 - 20 e-mails sent. It's kitten season.