Hi JohnCWM,
As far as I know, Dynamics CRM Online is only available in Enterprise plans. For detailed information, you can refer to the following link: http://community.office365.com/en-us/blogs/office_365_technical_blog/archive/2012/02/07/crm-integration-with-office-365-benefits-and-installation.aspx.
If you have any other concerns about the issue, I recommend you submit feedback about your requirement to our product team. With your feedback, our engineers can get more familiar with your need and further improve our product.
Thanks,
Anna Shi