ReadrBoard

Looks like a simple and effective way to engage readers and learn what content they like or dislike as they're reading.

This reminds me of Markerly (http://www.markerly.com/). There's a large potential to layer additional meta data and ways for readers to engage but I haven't been a fan of existing solutions, especially for mobile readers.

I may try this on my blog. I like the idea of people being able to interact in different ways, although I really don't know how many people really hover over text like that in articles and expect something to happen. Reminds me a bit of Tynt (which was acquired by 33Across). They focused on tracking what people copy & paste and share (via email). They were tracking a huge amount of data, but I don't think they could monetize it well enough.