If you have a site on a subdomain (mybobsleds.mysite.com) that you inadvertently ruined by getting a PR0 ranking, what would be the implications of obtaining a new domain (www.mybobsleds.us) and parking the old subdomain on top of the new one so that visitors to old site will still come to new site, and stats for both will be merged?
All marketing of the old domain would cease and there would be no association or connection (links or otherwise) between the two domains. Is there any possibility Google will be able to connect the two sites and give the new domain a bad PR too?