Hello all, I have valid h1b stamped for company "A" until Feb 2010, but last year I have changed my employer and my H1b got transfered to company "B", I am travelling to India in August, my question is do I need to re-stamp my visa with my new employer?please share your experiences.

No need for re-stamping..I faced the same situation, went to India last December, had no issues..carry at least 3-4 latest pay stubs, just in case.