ClickZ News reports on a new site ranking tool to be launched by PubSub. Called LinkRanks, it measures the “strength, persistence, and vitality” of links pointing to and from a given Web site.

According to the article, PubSub has begun an effort to compile lists of influential Weblogs by category, which could be of use to media buyers and planners eager to buy advertising in blogs.

By fiddling with LinkRanks’ parameters — now built into the PubSub engine — PR types can determine the approximate reach and influence of a particular Web page based on the sites that link to that page, either on a daily basis or over a period of weeks. They can also use it to focus their brand listening on the most influential group of blogs or publications.

Perhaps more interesting for advertisers, PubSub has also launched a series of category-based site rankings it hopes will be of use to online media buyers eager to buy into blogs. Its first roll-out is a “Fashionable Blogs” list which combines a fashion expert’s top blog picks with LinkRanks data on those blogs.

Via Marketing VOX