Then I asked the same question at ZenSix.com. Here's an excerpt of the reply with links removed:
If you're wanting to merge all of the databases into one, you would have to use phpMyAdmin to go in and physically rename each table and then find a way to merge them without having data conflict (post numbers, comment numbers, etc).
However, I think you may be able to create a new blog and then just upload all of the old blog's xml feeds into that one. But that's something you'll need to ask the people at wordpress about to find out for sure. Here's a forum post on that subject:
If you just want to backup the databases and create single blogs (not one big one), this page is all you'll need:
(After reading more about the XML feeds, that's definitely the easiest way to go. You won't have to backup any mysql databases at all, you just need the xml backup. You wouldn't even need to use cPanel)
I've also heard the hostgator shaves commissions when they aren't too busy ass fucking their customers.