I was using the plugin a few minutes ago and noticed that regardless if I edit a post or add a new one it posts a tweet. I would like to be able to select if I want it to post an update or not from within the post / page.
You could have a checkbox (similar to my last suggestion) that would allow me to uncheck if I want it to post to twitter or not based on the page/post I'm publishing/editing.
Another way to do it would be to add two more checkboxes in the settings area where you can tell it to post to twitter for posts / pages that were EDITED seperately from what you have now where it combines new posts and edited posts and then posts to twitter for each one regardless.
I hope you add those features...