In May, Google announced , but at this writing only developers had seen it. is similar, but available now. With Shareflow, you create a "flow" for a topic or project. That flow can include documents (including images and videos uploaded to Shareflow's servers), comments, events, and maps. You can forward pertinent e-mail messages to a special address, and they'll show up in your flow too. Whether you're using the free or paid ($80 per month) service, you can invite as many people as you wish to participate.

Even from messages of 140 characters or less, it's not hard to get a sense of someone's personality. aims to put some science behind the analysis. Give it a Twitter profile name, and it'll spit out a psychological dossier. Mine told me that I like similes, not metaphors; that I'm obsessed with time; and that my social behavior is limited (like I don't hear that enough from my wife). TweetPsych tries to identify other Twitterers who think as you do, but if I do tweet like any of the people it pulls up, I'm shutting down my account pronto.

Many couples are so busy that they can't even shop together online. For such harried people, brings some useful tools. Add a bookmarklet for the free service to your browser. When you see a product you're interested in, you click the bookmarklet and decide whether you want to save the page, share it with a friend, or both. When a friend sends you a message about a product you shared, it comes with a picture, so even if their note is as vague as "I like this!" you'll know what they're talking about.