When an end user visits a menu area of Acumatica...for example Cash Management, Sales Orders, Fixed Assets,etc. popup a new wiki screen reflecting a summary of the new features in that section of Acumatica. Include a "Don't show next time" checkbox for the user to no longer see each time they visit. Make this per user and provide Admins the ability to disable this feature.
Having customers and end users know new features (and eventually use these features) as they are released helps strengthen our customers satisfaction with the product as it helps end users do their jobs more efficiently and better.