Hello... There has been an issue since a while with the domain http://www.smashingfeeds.com and i received many emails as well as tweets about this.
Well, the issue was that the domain was about to expired and i asked my domain registrar to renew it, however due to some issue it didn’t happen and so domain was automatically went to parking list. Finally, issue was identified and not site is restored back.
All the users of "Tweet This" button were affected. It was noticed that all those blogs and sites who installed this widget, were redirected to http://smashingfeeds.com site. I am not sure why was that happened.
Now site and widget are working fine.
Sorry for inconvenience. For any question or clarification, let me know @blogfisher.
Enjoy and have a great weekend !!