First, Replay. Twitter's already integrated with Google search, but that only nets you real-time results. What if you want to read chatter during the last State of the Union address, or right after Shaun White nailed that Double McTwist 1260 in Vancouver? Replay lets you zoom back to any day and any time to find out what people were Tweeting about--think of it as a Wayback Machine for Twitter. You'll see a chart showing the frequency of Tweets on the subject you searched over time. To use Google's example, say you search for "golden gate park":

As you can see, there are daily spikes in the afternoon (when parks are the most fun) and an unusually high spike on March 27. Clicking on the 27th, you’ll discover it was a sunny Saturday, which may explain the increased traffic on Twitter. People were tweeting about disc golf and tennis, biking, riding a party bus, craving chips and salsa...the kind of local, time-specific information that up until now would be almost impossible to find online.

But this information will also be really useful for researchers and writers--it's totally new to be able to zero in on a specific window of conversation at some point in the past. It's available to use now, though it only goes back a few months. Soon enough, you'll be able to zoom back to March 2006, when the very first Tweet was Tweeted.

Follow Finder is another surprisingly useful Twitter tool from Google. Enter your Twitter name, and it'll deliver a list of other Twitter accounts you might be interested in following, largely gleaned from followers/following lists. If you follow comedians Rob Huebel and Paul Scheer, Follow Finder will suggest that you might like to follow Aziz Ansari and Nick Kroll, because most people that follow Huebel and Scheer also follow Ansari and Kroll. Simple, but useful if you want to expand your social network.

Warning: Follow Finder uses the term "Tweeps." Personally, that's irritating, in much the same way as Bravo referring to Top Chef competitors as "cheftestants" is a problem for me. But if you're not bothered by awkward portmanteaus, don't worry about all that.