The popular Joomla Module JSThumbs, is now called Joomla Miner and we're redeveloping it from the ground up.
It'll be a component, module and plugin and will be fully Joomla 1.7 compatible.
Display thumbnails form Joomla, Jomsocial, Kunena, Community Builder in a module or article in Joomla. Define your own "nuggets" that allow you to decide what data feeds the module.
Simple to uses, fully configurable from Admin and fast as a fast thing, Joomla Miner is the extension you've been waiting for.
To read more about Joomla Miner, the thumbnail extension for Joomla, here.