None of them are visa friendly per se. It's difficult to find a startup job with international hires for the same reasons that it's difficult to find them in the US.

Tech culture is very subjective. Most valley companies are in the business of making money, just like most other places. There are a few cutting edge products being built but those shops will hire highly specialized people with a lot of experience, why would such a shop want a person with relatively less experience ? (btw, your instamovie thing doesn't work properly on Firefox)

Start-up community in India is vibrant. I agree. But right now it's in age of infancy. Most of them are too much carried away by 'titles'. The products being built are mostly mashup of existing APIs. Most founders lack long-term vision, lot of people do it as a cool thing. There are few companies with real innovative products.

The valley has this problem too. Anyway, send me an email (address in profile), you seem like an interesting person to talk to while I'm in New Delhi.