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joined:Nov 11, 2000
Google is going to want different people with different Google accounts posting from different IPs. Otherwise, reviews would be very easy to spam.
If you were to manipulate the ratings and reviews and add your ratings, etc - I'd use a proxy ip, separate accounts using the IP throughout the ratings and acct creation process as well as building friends across your different accounts.
code the reviews on your Testimonials page in hReview microformat