I can't speak on iOS (which is what they seem to be targeting at least initially. Based on the picture of the iPhone on the splash page, along with mention of Instagram) because I haven't used an iPhone daily since the 3GS.
I used to use an Android device, but now use a Windows Phone and a lot of this stuff is automatically integrated into the default contact application in Windows Phone. Information can be pulled from Twitter, Facebook, Linkedin, Gmail, Outlook, and Windows Live. It also shows my history interaction with a contact (MSN messages, phone calls, e-mails, facebook chat, text messages, etc).
I seem to recall that on certain android devices (i.e. those HTC sense and Moto Blur) similar options were available. I know vanilla Android had some decent integration with facebook with Froyo.
Heck, even my mom's blackberry running OS6 has quite a few of these features (social network integration, history, etc).
Am I missing something here ?