Building back links will have different effects on different sites. I don't think it's fair to come on here and 'obliterate' a BST because YOU got a slap from google without giving all the facts. How do we know it wasn't terrible content on your site or dup content because the new algo changes do have a lot with having quality content. Link building is something we will always have to do SEO wise, good content is something that will ALWAYS make you rank higher regardless and will help you even if you get a slap. BW and George have already said more than once that they will help anyone that was affected. I just hate to see people come on and talk crap on a BST when there was already a resolution to an issue by the sellers.