Over the weekend, the information development team published this video. You can use this video to share with your end users and give them a tour of the new features in this release. (share it via a blog!)
Note that this video is specific to just the new features added in this release. If you are looking for an overview demo of IBM Connections 4.5, then check this out.
The video also covers the new Connections Content Manager and there will be another video released in the next couple of days focused on just that particular add-on for those of you interested in a deep dive.
Stay tuned for more!