We have recently launched a Product Updates blog for Harmony Email & Collaboration (link), where we will post a blog entry for every new feature and announcement.
You, your customers and partners can and should subscribe via RSS and email, so that you are notified of every new feature.
Updates will be posted a couple of days before features are released to all portals, to allow for gradual deployment and for customers and partners to be well prepared for the upcoming features.
subscribe now and enjoy
Yuval