I found a new site, that I don't think has been posted in BHW before. It is useful to "discover different stats for domains and find out history of their change. For example, you can check for domain's search engines keywords, find out how serp's positions changed for these keywords, discover detailed history of domain's backlinks, quickly estimate competition among domains and get other useful info. " Anyway the site is http://savedhistory.net/ and I thought it was pretty useful. Mods, if it has been posted before please link to it and delete this thread.