You can now use your own domain such as status.yourdomain.com for your Sorry™ status page.
Just set your chosen domain within Sorry™, then add a CNAME to your domain through your DNS provider. Within a few moments your page should be accessible on your chosen domain.
If you have any questions or feedback it'd be great to hear from you.
p.s. Your pre-existing *.sorryapp.com subdomain will still remain live, so it's always there as a backup in case your service interuptions are effecting your own DNS.