Some questions always floating in my mind... ????

Being a PR proffesional and always thinking about brands, lunches, crisis management, communication strategy.. their are some questions I always searched answers for????
Though I never had any formal education in the business of communication and marketing (m a Marine Engineer) I always had inclination for brands and brand management...

1. Can we compare the communication strategy of APPLE and GOOGLE???
2. How can new media avenues help in brand development and differenciate from the cluttered advertising?
3. Does rebranding really solve the purpose?? like L & T cement was rebranded as ULTRATECH cement, then UTI Bank to Axis Bank!!
4. Why Indians still love Thump sup more than Coke/Pepsi?? Afterall Coke and Pepsi are youth and international brands!!
5. Importance of internal communication for a company?

I am searching for answers for these above questions, searching on intenet, google, blogs, books... n every possible place. I think I shoul post these questions to Martin Lindstrom or Harish Bijoor (branding gurus).