Do-search is research with the emphasis on finding things out by just doing things and then learning from the feedback. They should be fun projects, with just sufficient implementation to test the key ideas; however, there should always be a good feedback system.
Zipipop has made numerous Facebook apps to sketch and test out the potential for more thorough implementation. A good example of this is Going for One? which we used to help develop Zipiko.
Do-search is Zipipop's equivalent to Google's 20% time.