Finally updated the site to the latest version of WP. I did retain the old theme (even though Theme Check doesn’t like it..) and all other content that was on the old site, except maybe for minor changes to sidebar and footer.
I have also setup an SSL mirror, for those who feel better browsing my site using SSL. It can accessed using the link below (redirects to the actual site):
I will try to keep the mirror and the main site synced so they should contain exactly the same content (remind me if I forget to, dds[alpha]ddscentral.org).