[hoosierglass]

Balinor's choice is a good one. It also has analytics so you can see how your customers are using it. You can also turn off send to a friend and just use the option in sharethis. The only draw back that I can see from this is that it draws from another dns. So if your site has this and a SSL cert, then your site from Google is seen as drawing from 3 dns. Not sure if it dings you or not, but would like to have more insight from Google.