Whats the procedure for creating a second public facing website in Office365/SharePoint Online?
I am concerned that going through the Public Website Plan Wizard will automatically overwrite the current website that is pointing to a custom domain.
Any assistance on this is appreciated and I can provide more information if necessary.
You can try creating a sub domain in Office365 and using a CNAME record in your DNS. I am not sure if this will solve your problem though depending on the version of Office365 you may have.