Realtor.com operator Move Inc. is beta testing changes to the official listing portal of the National Association of Realtors that the company says are aimed at making the site easier to navigate and use. First-time visitors will see a simplified home page that encourages them to "dive into search," while returning visitors will be served up a location-specific landing page that "intelligently remembers what they've been doing on the site," said Move Creative Director Amit Kulkarni in a blog post explaining the planned changes.Kulkarni said those and other changes will be implemented "in phases and increments, and we're going to be keeping a close watch on what works and what doesn't."The new home page design and other changes are being tested at beta1.re...