Our App of the Day today is Ustream 2.1 for iPad with iOS 4.1 or later.

Yesterday Ustream launched version 2.1 of its iOS app and with it came native support for the iPad with a totally sexy interface for watching your favourite live streaming of rare African birds, and other things.

Ustream powers live interactive video that enables anyone to watch and interact with a global audience of unlimited size.

With the Ustream app, go live and follow your favorite broadcasters anytime, anywhere! The Ustream app now combines the best of broadcasting and viewing into one convenient app for devices running iOS 4.1 and newer:

-Broadcast and interact with your audience through chat and poll

-Discover the hottest Ustream content showcased in a Featured carousel

-Follow your favorite shows by joining Ustream Crowds and getting alerts for events

-Share with your friends on Twitter and Facebook when you broadcast and discover content

-Customize the menu with your most used features

The latest version of the app includes the following changes:

What's New in Version 2.1

- native iPad interface

- Broadcast and interact with your audience through chat and poll

- Watch live events and participate through chat

- Discover the Hottest Live, Recorded and Upcoming Ustream content

- Follow your favorite shows by joining Ustream Crowds and getting alerts for events

- Share with your friends on Twitter and Facebook when you broadcast and discover content

- Airplay support for true social interactive viewing of the chat and social stream