@SirCamaris
You can use Servimg (http://www.servimg.com) for pictures or PicFront (http://www.picfront.org) as Germanunkol suggested for pictures/rar/zips. If you have files up to 600mb you can use Filefront (http://www.filefront.com).
If your posting game design document you should post it in doc/pdf format, and if your posting game idea use simple reply.
George made 20.01.2010 to be the deadline for GDDs/GIs posting.

...to be honest I'm not sure what happens after the deadline. Maybe George will choose one project or make the project choosing to be public or make some sort of compilation-project from posted GDDs and Gis. We'll see.