I got lucky to use this while it was in private beta - author is HN user webmonks. Would love to hear feedback on this.
I like this better than the way Twitter was integrated by Google on Search:
1. It is not inbetween search results. It doesn't distract esp since the plugin isn't smart right now to distinguish query as worth for "real time" results
2. It always gives the real time results. We had mild tremors couple of months ago and this would instantly confirm when I searched.
I don't like tweets from other languages crowd the results sometimes, but it is just as smart as twitter search :)