here's a link that connor wolf posted in another member's thread asking about dorrance:
http://forums.thebookforum.com/showthread.php?t=8538
author house is mentioned there, as well as dorrance... go to preditors and editors for info on any publisher or agent you aren't sure of... here's what they have to say about author house:
AuthorHouse (formerly 1st Books):
Not recommended. A vanity publisher.
here's a link to their site:
http://www.anotherealm.com/prededitors/