Earlier today, a startup called Siri that wants to bring virtual assistants to the iPhone came out of stealth. Siri brings a very advanced collection of technologies (speech recognition, natural language processing, semantic data processing, and geo-location) to create a virtual assistant that helps you perform tasks through a conversational, question-and-answer interface. You can read all about it in this lengthy guest post by Nova Spivack.

But sometimes it is easier to just see the product for yourself. Below is the first public demo video of Siri, which I got on video today from CEO Dag Kittlaus at the AllThingsD conference in San Diego. Siri won’t be available on the iPhone until later this summer.