What a week it was last week. I released our NiftyGridZPro Zazzle WordPress plugin having tested it thoroughly. Great :)
I then realized we could remove one of the restrictions. I was unhappy that you could only allow user interaction with a grid on pages and not in posts and saw a way to allow it. A fairly simple tweak.
Here's a screenshot of a product grid allowing interaction:
As it turned out, not so simple. After a few false starts, the team got there in the end. Which is nice!
So the only restriction now is that you can't allow your visitors to interact with grids you put in a widget in the sidebar.
See it all in action on the NiftyToolZ blog, here: http://niftytoolz.com/blog