Type of Site - e.g Forum, News, Social Network, Blog
=SiteType("http:www.foo.com") => Forum
By parsing certain phrases synomymous with sites you can determine the type of site.
e.g PhpBoard = Forum
e.g. www.foo.com/blog/ = blog
Need to think out the things to sniff, cos there are some constants on some sites which tell what a site is.
This is useful for taking a large list of links and graphing the Type.