My name is David and I work for a company called LearnOutLoud.com.
We're currently amassing the internet's largest directory of audio and
video learning titles. To this point we've built our database with the
help of various publishers and retailers providing us with datafeeds
as well as a lot manual data entry. Now we're looking for services
that can provide us with a complete resource of content for audio
books including the following details:

Title
Subtitle
Author
Narrator
Format (Audio Cassette, Audio CD)
Number of Format (# of CDs, # of Tapes)
Unabridged or Abridged Edition
Publisher
Running Time
Short Description 
Long Description
Category
Release Date
ISBN for each format  

Currently we're working with the wholesaler Ingram and their content
is a little bit costly with a $2000 setup fee and $200/month to
subscribe. We're also looking into leasing content from the other
major book wholesaler Baker & Taylor. But I'm wondering if there's
other resources for attaining a database of information about books
which we could put into Excel or Access and then upload onto our site.
Do you know of any?