My apologies for my blog being down for 4 days!
I was playing around with a new plugin or two and they somehow corrupted my .htaccess file. Figuring out how to fix it was much more difficult than usual. Since this has happened 3 times over the past year, here is a reminder to myself from Jeff B. (Thanks, guy. You saved my sanity!) on what to do.
First, login to your wp-admin and go to Settings > Permalinks
Go to the folder that your wp-admin, wp-content, wp-includes directories are located. Check for .htaccess file. If it exists skip to step 4
If it does not exist, create a new blank file in your FTP program called .htaccess
Change the CHMOD for your .htaccess file to 666 (your preference on how you want to do this)
Go back to your Permalinks page and edit the link structure you want. Problem should be solved!
Make sure to change the chmod of the htaccess file back to 644 after you are done.
The remainder of the fix I already know.