Yifat, the integration between Marketo and GTW was working the last time I checked (yesterday). Are you not able to select GoToWebinar in the Event Settings? If so, you need to install the GTW Adapter. Currently Marketo only passes First Name, Last Name and Email Address to GTW, regardless of which fields are in your form. They hope to add more fields in the near future, including Company Name and Job Title. However, there is no provision for passing a webinar date to GTW, but if you send the confirmation and reminder emails from Marketo, that shouldn't matter. What does matter is the confirmation and reminder emails will need to include the GTW Webinar ID and their Registration Code. Not sure if you can keep re-using / re-scheduling the same GTW event once it's passed. You cannot select a new GTW event from a Marketo event once the event has members.