Ubona is a voice search engine that has just gone live in Bangalore. All you need to do is to call their number (080-4070 0000) and speak out the name of any of the place or product (currently only for restaurants, hotels, sweet shops, bakeries). Their speech recognition system will comprehend what you have said, and connect you with your desired destination or, if you are calling from a mobile phone, send the information as SMS. The service is accessible from any landline or mobile phone at no extra cost. While they are starting off with food joints, they plan to soon extend this to include other domains- entertainment, health, travel, consumer electronics, gifts, shopping etc. Ubona is targetting not just the consumer market but also business users (as a way for companies to reach out to their consumers).
Voice search engines are not easy to build; there are issue of speech recognition, lack of audio clarity, accent differences etc, but if the system can be trained to work in the majority of cases, this can be a very compelling product. Specially for the mobile platform, where form factor considerations are a big bottleneck for search to pick up. BuzzWorks is another voice search engine that was featured in the last edition of Proto, though (if I remember correctly), they seemed more focused on local utilities (like plumbers, carpentars, car mechanics etc).