You should use TweetSuite rather than a TweetBacks plugin.
I’ve just put together a WordPress Plugin that take advantage of the new features I built into TweetBacks. This is still beta stuff and you should expect updates to it soon and frequently. For the most part v.2 of the JS version works the easiest.
I’ve gotten a few questions about this, after you activate the plugin, you have to go to Settings>TweetBacks and enable it.
And that’s the new logo by the amazing GoMedia above.