I'm getting pretty close with pngWriter, the kinder, gentler way to do tweetstorms. I did a video demo of the software last week. Have a look.
It's rough, there was no script, but if you watch it you'll see the software in action and can't fail to get the idea, imho.
Hope you like! :-)
PS: It's pronounced as if there was an I between the P and the N.
PPS: Here's an example of a post I wrote with pngWriter.
PPPS: And my pngWriter RSS feed.