I would eventually like to move my site to using an SSL certificate. But if there are http links on site, then a users browser will mark the site as having mixed content.
Already done! All scripts are protocol agnostic or https so you should not have any issues either on http or on https sites.
Quick note to let you know that a closed facebook group has been created here: https://www.facebook.com/groups/825342177622880/
for the interested parties. Please feel free to join the conversation