Import from Openagenda.com
Should be great to integrate Openagenda.com agenda directly in The Event Calendar
I have some good news.
As it turns out, you can do that using the export option from Openagenda.com
Simply click on the "Export" button of any agenda and grab the URL of the Google Calendar feed. Once that's done, you can simply import it using Event Aggregator.
Let us know if that helps