Except I'm terrible at that.

I've narrowed the service down to either Stickam or LiveStream, but none of these sites are very good at showing you what it's like until you sign up, download and install and configure a bunch of crap, and start streaming.
edit: The dealbreaker was that LiveStream is more fond of removing a mid-stream portion of video randomly for each user without notification to the broadcaster in favor of an advertisement video with sound. Since Stickam's ads are
slightly less hostile to the broadcasting process, I'm going to try them; if it doesn't work out, I'll go back to ustream. More details on the channel later.