Yoav and Yee, here – on this most auspicious of evenings, we are delighted to announce the release of our first app, Katango, in the iTunes app store!  If you’ve ever been horrified at an unintentional overshare (whether you committed or just witnessed it), or you’ve virtually stopped sharing almost anything because your social network is so big that most of the people in it aren’t people you want to see every pic or status update, Katango might be just what the doctor ordered.

What does it do?  Katango auto-magically sorts your friends and family into groups. Katango groups are great for private messaging and photo sharing. And, it’s free!

Here are a few more details:

FREE AND UNIVERSAL: Katango is free to install and use with any iPhone, iPod Touch, or iPad anywhere around the world.

AUTOMATIC: Katango automatically and instantly does the work of creating groups so that you don’t have to sort through all your contacts, adding people one-by-one.

PRIVATE GROUPS: You can share updates and photos privately with your Katango groups without worrying about unintended people seeing your messages. Comments and replies are kept private within each group, too!

TEXT MESSAGES: Katango lets you easily send free, unlimited text messages and status updates to your Katango groups.  No texting charges for sending messages!

The friends in your Katango groups will receive messages instantly if they have the Katango app.  Group members who don’t have the Katango app installed yet will get your messages wherever they are via Facebook, email, or SMS.

PHOTO SHARING: Katango has unlimited photo-sharing built in so you can share photos with Katango groups.  Easily take photos from inside the app (including self-pics on devices with a forward-facing camera) or pick from your Photo Library.  All for free.

INSTALL: Try out Katango today, free in the iTunes app store!  Katango’s automatic social organization makes it easy to send private messages and photos to just certain friends.

And if you’re not quite sure when you’d ever need to do that, think about this, and this –  and especially this.

Enjoy the app, spread the word about Katango, and share your Katango experiences with us on Facebook, Twitter or via email, at blog at katangoapp.com.

Yoav Shoham is the Co-Founder and Chairman of Katango, and a Professor of Computer Science at Stanford University.

Yee Lee is VP Product at Katango.  You can follow him on Twitter at @yeeguy.