It's been almost a year since I've posted to my blog, and have totally forgot my login info. Sixapart has not answered my pleas for help, and I don;t remember what email address my account was registered to I'd really like to get back on, but so far my endeavors have been full of fail. Please help.

You need to look into the database to see what email address you used to register.

Where does one access the database?

Depends on your database and your host.

For example, my database backend is MySQL which I access through my hosting control panel.