If you are planning to travel to India, I can only recommend you the so-called backpacker's Bible : the Lonely Planet Guidebook.
You will find all the maps of India
you had ever wanted on this site.
A very interesting site about Indian culture, history, facts and travel. Also quite beautiful.
You'll find lots of links here : general information, picture galleries, travelogues (from 1988 to 2001, so far), official sites, and so on.
Complete guide to all attractions in India.