Refining their design wasn't the only new thing from Google today. Google also made news with Google+ which is their latest attempt at social networking.
This isn't the +1 button from a few weeks ago, but rather a Facebook like network.
Hard to know what to think given Google's very poor track record with anything social, but I have to say there are some interesting things in Google+
Danny Sullivan has a really good review of Google+ at Search Engine Land. Like Danny, I think the name Google+ is awful.
Here are some videos from Google showing off the new network. They might all be included in Danny's article above. Here's a limited demo of Google+ you can play with.
A lot of what Google+ is offering is comparable to things you'll find on Facebook, though some of it is done a little differently. The main feature is Circles which lets you organize your friends into different groups and control what you share with each group. Facebook has similar with groups and lists though you might be getting better control with Circles.
There are some new features like Hangout and Huddle though if either becomes popular you'd think Facebook could easily replicate the features. A lot of Google+ is a but half baked too in that things you'd expect to be included in your profile (like +1) aren't currently included.
At the moment Google+ is invite only so none of us can sign up. It looks like Google wants to be cautious after taking the exact opposite approach with Buzz. I doubt Google+ will be replacing Facebook any time soon, but it is the most interesting of Google's attempts at social network to this point and I can see it might have some adoption once it's open to the general public. Assuming what happens on Google+ also affects where web pages rank, something more than likely, it'll be something we might all want to pay attention to.
Read Danny's post and watch the videos to get a good idea of what Google+ is or will be about.