My goodness! Google had stopped the dance and deferred my rank from 1st position to 3sr in the SERPs and was a pinching experience but a learning curve for me all this month.
The dance was exactly started in the last month i.e., 1st week of June 2006. Well, it was, I think because of the changes that were made on pages in bulk and made live. There were also Targeted Keyword's links anchored to the home page and the relevant pages of the site repetedly.
Now, I need to fine tune the pages by making them more relavent to the users and also the Search Engines.