I have a site with around 300+ pages and each page targets different keywords... I have recently started building tier 1 > tier 2's for some of the pages and their rankings have been increasing... but I have a question now which seems to be confusing me.. I am using the popular web 2.0's platforms such as blogger, weebly, tumblr, wordpress and few others for my tier 1.... I am good at the moment but what when I am finished using all the top web 2.0 properties??? Because after that when I will use them again, Google will see that I already have links from these sites like wordpress.com, tumblr.com... Can i continue to use the same platforms over and over again for creating tier 1 properties for my other pages?? or I have to find new web 2.0s' then??? One more thing... does all the web 2.0's on a platform have the same IP address??