Learn how to use multiple audio sources with Ustream. Usually in order to record more than one audio source (ie your mic) you would need an expensive mixer. Learn how to use a cheap piece of software to include sources such as music and sound fx into your live stream bypassing the need for a mixer and upgrading the production value of your show.
Special thanks to @sneakerpeet for creating this screencast. Visit sneakerpeet.com for more valuable content!
Video streaming with multiple audio sources: The screencast from Peet Sneekes on Vimeo.