Memory Walls - What's old is new again?

The idea of a "memory" wall or multi-frame layout has been out there for awhile, but I just came across some new and cool ideas from Pottery Barn. They have a new section on their website called StyleHouse, where they explain the how-to's behind certain home decorating accents and ideas. They provide downloadable templates for 5 different memory walls. Here are a few examples:

I also saw a few cool ideas for memory-type walls, or just "idea" walls at poppytalk. Check this one out - I think I'm going to put it up in my office, but maybe use binder clips at each end to avoid curling...