Tinker.com allows you to ‘Discover and join top conversations on Twitter and Facebook’

…and the provide some interesting sidebar widgets that help you engage your readers in the same.

http://www.tinker.com/widgets/

Tinker News Widget

They also have:

Search widget
Profile widget
List/Group widget
Event widget

Tinker.com

Related posts:

1. Facebook Apps On Any Site = FB8 Widgets on any site
2. Spleak: Social Discussion Interactive Widgets
3. Networkedblogs uses Facebook to create blog social network
4. Netvibes To Get A Bigger Social Graph With Facebook Connect Integration
5. Google adds social bar… saving sidebar

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