web 2.0 sites can be used in many different ways. But, if you are working on your blog or site’s SEO (Search Engine Optimization) you can use web 2.0 sites for building link wheel. As you know, link wheel is one of the most advanced and best SEO methods, and it’s extremely effective when it comes to giving your site a boost in its ranking. Web 2.0 sites are free and with their high page ranks, using them to build link wheel will help your blog rank higher as well. Here is a big list of web 2.0 sites, web 2.0 properties, blogging platforms or whatever you want to call it along with their current page rank.