15. A computerized method for providing users with suggestions relative to items shown on one or more websites based on preference correlations across multiple websites, wherein one or more processors perform the method comprising: when a first user visits a first website and shows interest in a first item, recommending to the first user a second item available on at least a second website, based on published reviews available on at least the second website and a third website; wherein the first item previously was reviewed by a second user on the second website and a third user on the third website; wherein the first item was also previously reviewed by a fourth user and published on both the second and third websites under a first userID; wherein the first item received positive reviews from at least the second, third, and fourth users; wherein the reviews from the second, third, and fourth users were retrieved by a Web crawler and wherein the reviews from the second, third, and fourth users were stored in a database based on each user's published userID; and wherein in general, published reviews from the second, third, and fourth users correlate with each other.
15. A computerized method for providing users with suggestions relative to items shown on one or more websites based on preference correlations across multiple websites, wherein one or more processors perform the method comprising: when a first user visits a first website and shows interest in a first item, recommending to the first user a second item available on at least a second website, based on published reviews available on at least the second website and a third website; wherein the first item previously was reviewed by a second user on the second website and a third user on the third website; wherein the first item was also previously reviewed by a fourth user and published on both the second and third websites under a first userID; wherein the first item received positive reviews from at least the second, third, and fourth users; wherein the reviews from the second, third, and fourth users were retrieved by a Web crawler and wherein the reviews from the second, third, and fourth users were stored in a database based on each user's published userID; and wherein in general, published reviews from the second, third, and fourth users correlate with each other. 16. The method of claim 15 wherein to be shown the first item available on the second website, the first user need not be identified by the first website and need only show an interest in a product or service, or in a product or service category.