Here's what I have to configure, and how I configured it.
Supposedly, if your database is on the same server as your site, you shouldn't have to put the hostname, you can just use the database name. But I've also heard it's best to connect through your hostname, even if just the database name works, so who knows.
Anyway, when I try to load it it gives me this:
Loading initial data into system...
An error occurred while loading data:
Connection error: Unknown MySQL Server Host 'www.mysql.ryannet.org' (2)
I have no idea if I have something wrong, or if it takes a while for the database to start working, since I just named the server about 15 minutes ago.