Google Talk Guru is an experimental service that allows people to get information like sports results, weather forecasts, definitions etc via chat. It works on many popular chat applications that support Google Talk. Google Talk Guru application is intended for chat (IM) users, including users using chat clients on low-end phones, allowing them to answer simple web queries from the context of their chat application.
For using this new feature, Google account holders have to invite email@example.com to chat, and then send queries via the chat client.
Google Talk Guru works like this - If you want to know weather in Mumbai, just enter "weather Mumbai" and you will get the answers you are looking for. But, currently only few search queries are working. It is expected that this service will be extended to all other Google products.