The Zu Online site has been updated with the "Secrets Revealed #3" article. Featuring a look at design detail, here's a snip of the article:

Knowing that the design team for Zu Online pays such close attention to details, is it any surprise that they would even strive to make Zu easier for you AND your computer? A unique feature that would probably have otherwise gone unnoticed is the seamless map transition. The design team felt that using up RAM on your computer to store different maps would be an unnecessary burden so they designed their maps to seamlessly transfer from one to the next. No more waiting for the next map to load, while also reducing computer lag. Now that's thinking outside the box.

Check out the rest of the article and a couple of nice looking screens at the link above.