Byobu4 released earlier this week, with some awesome new features, including a prompt for the behavior of ctrl-a the first time you press it, vastly improved scrollback with alt-pgup and alt-pgdn, a new utility called byobu-quiet that enables you to disable all distracting eye candy (and re-enable it with --undo), and a handful of other things.
One question I get a lot, though, is for a video that demonstrates some of the most common keypresses. Ted Gould pointed me to the Google Code project called key-mon, which I've just uploaded to Ubuntu Oneiric as a new package. And using key-mon, xvidcap, gnome-terminal, and an SSH connection to an Ubuntu 11.04 instance in EC2 (upgraded to byobu 4.0), I've created just such a screencast. Enjoy ;-)
The backing track is Free, by Phish, from the Billy Breathes album, available for purchase here or in the Ubuntu One Music Store (sorry, I don't know how to hyperlink to the U1 Music Store).