Awesome to hear that you liked the ion cannon concept, and indeed, most of the concepts that vaderios and Bingo have been throwing around. Hopefully you like some of the RotJ stuff they've been throwing around also.
What about Vader's Force choke of Lando? I know its not important, but I'd love to know if things I've come up with (Rebel Transport jumping to hyperspace, etc) actually might make it into the final cut... I'm just being selfish realy. :-)