Well if this isn't one of the neatest websites I've seen in a while...
Basically, with this FREE service, you can plan a group getaway, and manage everything online.
They have hundreds of locations, itineraries, and budgets to choose from. A cool option they offer- you can have hotels bid on your group trip! You can even order group "gear" like tee shirts and bags. A very funny thing they have- group mad libs. Those always made me laugh.