Is link exchange a science that can turn to be called Linkology or will it stay on a social connectivity level ?

A lot of webmasters worries about numbers of backlinks they can get in order to rank higher on Google, Yahoo MSN but you have to make attention that quantity is not everything, you should have better tools where it can show you the quality of those backlinks.

Add a live badge to your blog or website that queries Yahoo Site Explorer for the number of links to your site or page on the web. Select the type of link counts you want, the size and look of the badge and then cut and paste the code to your web site.

Check it out here Yahoo Badge for Backlinks