I had to write to a friend of mine who works for Wikipedia to share my enthusiastic support for the new page preview feature--what a fabulous (albeit slightly ADD) addition to an already amazing learning tool. He pointed me to the page explaining how much thought you put into this, and detailing how aware you are already of "rabbit-hole"-style learning. The visuals in pop-ups are especially great and aid in the contextual flow of learning, making a visit to any topic a potential adventure in learning that's actually even more fun and probably really effective from an educational point of view. As a parent of a young son who will likely be surfing Wikipedia pretty soon, my sincere thanks for caring enough about effective learning and helping to make the pursuit of knowledge an entertaining, self-guided interactive adventure.
-Tom Sturm
Easthampton, MA