Startup Idea : Party Planning Website

You need a website to throw a party; yeah, there's Facebook events. But Events is for getting your event out there -- all of the work that goes into has to be handled elsewhere. But where? Party.com. A website that can be used by clubs, societies, or ordinary people planning surprise parties to Christmas pageants; DIY party planning. People can be assigned tasks, taking on roles as contributors, advertisers, and there could be an easy display list of required materials, expected guests, finances and more.