authorSTREAM recently launched Presentation Channels, a presentation grouping/clustering feature for members. Presentation Channels allow users to create a channel around a cause, issue, interest etc, and add related presentations. Other members can also request to add their own presentation in a relevant channel of their interest. Channels are also embeddable in external websites. The LifeJoy channel, for example, groups presentations that promote optimism and remind us about invaluable gifts from nature; check it out: