Since this is here, here are the steps I had to go through for changing my domain name.
Long story short, I lost the original domain, my registrar went out of business and I'm working to get it back. Temporarily, I registered the .net version of my same domain. I wasn't changing hosting companies, so all my files were staying in the same place.
Step 1. Edit config to change the home variable to the new .net domain. Save and upload it.
Step 2. Run SQL query on the database to change all mysite.com links to mysite.net links to update the newsfeed. This was a pita, and is something that shouldn't have to be done. Oxwall shouldn't store those as absolute URL's. It doesn't store any other images that way. Avatars, group avatars, and most plugins (Photo albums, group covers, profile covers, etc) all still worked fine.
Step 3. I use the paypal billing plugin to manage memberships. I had to go into my selling tools on PayPal's site and update the domain name to the new one for the instant payment notifications.
Step 4. (I forgot this one...) I had to go change my cron job to reflect the new URL.
Done and dusted.