E-publishing isn't that different in that you have to check out your publishers. There are scams in e-publishing the same as there are in print publishing and vanity publishing. So check them out and be careful. A good rule of thumb is, if they ask you for money, run. They pay you, you don't pay them.
Different publishers like and publish different types of books.
You check them out the same way you check out the NY publishers, you go to their sites and look at what kinds of books they publish. If you want to submit to one, you read some of their books to see what they like. Also, go to their sites and download their submission guidelines and contracts, to see what you're getting into before submitting. The AEP one is the Association of Electronic Publishers and has a list of their members who follow certain guidelines. Most of the steps are the same as with print publishers.