This 'selective sync' feature would be useful for me too. I had been using Evernote frequently for several years and my usage has decreased significantly to conserve hard drive space in my laptop. This feature is also stopping me from upgrading to premium since I do not even upload 60MB per month as a result. (Of course, there are other premium features than just extra space.) This selective sync feature would be useful if I can choose to archive some of my notes to be stored on evernote servers only, just like Sugarsync provides a 'web-archive' feature.