Google just releases its first service after they bought Wiki service provider Jotspot, Google Sites. It is a part of the Google Apps. It allows you to build a site to centralize all types of information, from text, videos to presentations. You can also set read permissions to restrict your readers. You can also invite other people to be editors of your site.
Remember, you need an Google Apps account (free ones are okay) to register for Google Sites.
Click an image to see example sites: