Demo Girl is a cool site has demoed hundreds of screencasts, and I'm honored that she found Taboo useful enough to create a screencast about it.
In her taboo screencast, she covers how it works, including some of the newer features like the dropdown next to the [T] icon, and the hover feature on the grid view.
I'm sorry to say that I expect the screencast to be out of date soon, as I'm finishing a cool "mosaic" view of tabs, as well as resizing on the grid view. :)

I have a few more bugs to fix, but I hope to release the new version this week.
Taboo was also recently covered by Download Squad and Life Hacker.
Reading the comments on those posts, I can see I need to do a better job of explaining what taboo is and is not as many where confused about what it did and why it was useful (or they can just watch Demo Girl's screencast!) There were several people wanting a syncing feature (which has been requested on the google group), and I'm hoping to implement a syncing feature next month. I also like the comment by ma5t3rw1tt about saving tab groups. I need to think about how the interaction would work.
