What does Zingku actually do though? Well, the only information I have is from their website -- and it's not particularly helpful. By the sound of it though, Zingku takes full advantage of SMS -- making it easy for anyone who has a mobile phone to participate. This SMS service integrates with their companion browser-based service to make it easy to share things with other people in your network. Unlike most social services, instead of developing a website and adding a mobile layer on top, they created the social service with mobile devices being their targeted platform from the beginning.
Our service is designed from the mobile phone, outward, allowing you to create and exchange things of interest ranging from invitations to "mobile flyers" with friends in a trusted manner. On the mobile phone, Zingku uses standard text messaging features that come with every phone. On the web, our service uses your standard web browser and instant messenger. There is nothing to install.
Google has been pushing out services that not only function, but function well, on mobile devices at a faster rate than ever before. This is just another example of how serious Google is when it comes to mobile applications.