Post Promoter Pro is a plugin that helps you boost your readership and visibility by scheduling automatic posts to Twitter anytime you publish a post. I have been using Post Promoter Pro very successfully for the last several weeks and would like to demonstrate it to you now.
The plugin claims to be “the simplest way to promote your WordPress content with maximum results”. While I cannot say for sure if it’s truly the simplest way since I haven’t used all of the other options, I can say without a doubt that it is really, really easy to use and works exceptionally well.
Since turning it on two weeks ago, I’ve noticed a definite uptick in the number of comments on articles that are shared and retweets on Twitter.
My Rating: 
I might have missed something in the demo, but if you’re running multisite with many different blogs, will this end up blasting out tweets and posts for all the WP blog posts at the same scheduled time?
No, it is setup on a site by site basis.
Very cool! I plan on deploying this once our site goes live!
It seems that you are only able schedule 1 automatic post to Twitter per day. Am I reading that correctly?
Yes, that is correct.
was looking at that plugin the other day, i been using word twit pro from the guys that developered wp touch