I saw ManyEyes at LotusSphere in the labs this year and was reminded again of it when I found a link to it on this blog.
It’s a powerful tool for embedding dynamic visualisations into your site. The most powerful feature I think, is the way that comments posted on a visualisation keep a link to the visualisation the user who commented was seeing. This is something that could be extended into many different arenas — imagine a dynamic comment system in wordpress where you could click on a comment to see the text someone had highlighted when they made the comment etc . Or YouTube, where users could comment with linkbacks to the footage they were specifically commenting on. I’m sure we will see more of this.