souvik,
When using Flash Text,
Flash Buttons,
Flash Movies,
Flash at all:
I recommend mixing in HTML body text and textural links with the Flash. GOOGLE recommends a site map and textural links.
1. You can still "dazzle" with the mix. One of our last launches for a client has 2 quick loading Flash movies on the Home Page, but a good mix of HTML + 2 navigation methods (one textural):
http://www.tubeltechnologies.com
2. Another method "4Guys" (a leading Houston Web Design Firm) used on their home page was to have mostly Flash visible until you scroll down at 1024x768 res.:
http://www.4guys.com
3. Of course you can make it big like
http://www.2advanced.com (in top 2500 sites)with 2200+ sites linking in and do anything you want - Believe me every page gets Ranked then!
Good Luck,
Ken