Changed site over to a new Subject so have i got to start all my SEO again.?

Just launched our new free Short URL Cloaking Service + Marketing site http://www.scepd.net/ this is on a fast dedicated server for reliabilty and speed,the thing that i am a little concerned is that the site use to be a proxy site till this week,the site was promoted before but have i got to go back and start again because the subject of the site has changed.

Can i still use my old google verifying and sitemap codes or should i add new ones or will the search engines pick this up and will i get penalized for this ???