crazy idea

hi all,
i'm really happy for being a member in CrazyEngineers...
i'm searching for a "crazy idea" for my graduation project,something that you really need and dream of...my team is able to learn whatever needed to do a project if we liked the idea,we already know about c++,java,Linux,web and some of us know about hardware,but mainly we want to make a software project..we were thinking about VoIP,mobile applications or integration between most computerized devices in one Application..so if any one has a really good idea,please help.

thanks in advance!