Looks awesome. I hope you succeed but the average person is going to be weary of accidentally auto-sharing that "article" they were reading on redtube.com
Thanks! Automatic sharing is opt-in instead of opt-out, which means you would have to manually add a site like redtube. On top of that, we've prevented our software from ever touching certain sites, including search engines, webmail accounts, banking or financial institution pages, and adult websites.
Check out our faq: http://lookmark.com/faq