What are some ways of creating feeds in the RTC client?

What ways are there for creating feeds to use in my RTC client? For example, how can I create feeds that will show up in the "Feeds" section of the Team Artifacts view?

I know that the following feeds are created by default when connecting to a repository/project:

• Build Events for My Teams on somehost.com
• My Teams in Some Project
• My Work Item Changes on somehost.com

I also know I can create a custom work item query feed by creating a Work Item Query then choosing "Subscribe to Query Feed" from the drop-down menu. 

I also see that I can right-click on the Feeds section of my Team Artifacts view and create a new Team Events or Query Feed subscription feed.

Are there any other ways I can create a feed?