The consumer backlash that hit the Gap after it unveiled a new logo in early October demonstrates the powerful connection people have to the visual representations of their beloved brands. This got us thinking about other super-brand emblems, and whether they could be improved upon. We then challenged five design shops to re-create the iconic logos of Google, YouTube, Facebook and Twitter. Given the opportunity, how would they reflect the spirit of the services these Web powerhouses provide? Here are their ideas.