Updated: Setups and escapes for unblockable Ultras in Street Fighter 4
A reader sent over this clip showing some more practical set ups for unblockable Ultras in Street Fighter 4. Also, you can see how to do this trick with Gouken and Sakura. Also, there's two more videos of this being done with Dhalsim and Chun-Li.
And yet another movie was pointed out by Krabe displaying how some of the characters can escape these setups.