Mike, currently there is no way via the web interface to export a list of domains. You can use the API (GetAllDomainsWithProperties function within the svcDomainAdmin web service) to get a list of domains then check the the "isenabled" property. Alternatively, I have created a simple tool that will display a list of domains and their status, which you can export to CSV or a text file. If interested in this tool, let me know and I'll send it to you via a ticket.