A site of mine has more than 4k backlinks to it (article directories, social bookmarks, forum links, wiki links, web 2.0 links etc.) and it has 0 PR. I saw a site which I had already reported and it had 10 links. Its PR is 4. Which makes me wonder... How do people do this? Is it only a matter of getting a high PR link and then blasting that link with tens of thousands of links in order to pass the link juice?