That's a great question Luis.
I do some writing for the popplet blog and you can see how others use Popplet.com at http://blog.popplet.com
In my opinion, Popplet is underutilized as a way to drive website traffic. For example, people could create a popplet board around a particular idea, share it publicly and then tweet the link using hashtags related to your audience or popplet content. This would inspire traffic interested in the concept to have a look at your popplet board. Few popplet users are using popplet in this way as yet.
You can embed links directly into a popplet so if you were attracting visitors to your popplet board, you could then include links to your hubpages or other website sources so readers can doubleclick the link in your popplet to directly dive deeper into your online media outposts.
You can also embed your popplets into webpages and blog posts, as a way to keep your readers engaged and interested in your written content. There is a tutorial on the popplet blog explaining how to do that. Embedded popplets are a great way to liven up a blog post and present the information you want to share (or your background research) in a visual way that helps readers engage with both their left and right hemispheres.
It's such a great question, i am going to head off now to write a blog post and hubpage about it in more detail! I'll let you know the links.