If you are concerned that YouTube and Flickr are too well-known and people might be monitoring them, or you just want to try something new, you can use platforms like 4shared and Dropbox to load online and allow people to easily search and access your information. Both of these platforms have a desktop function that makes it easy to just drag and drop information into your folders.
If you want the information available to the world, both platforms can create collections of files that are searchable on Google. They create a public link that can be used by any recipient or discovered in a search engine. They include a view-only preview for many document and media types.
Storage limits on both sites prevent unlimited free usage. If you are using Dropbox for free you only get 2GB of storage. 4Share allows 15GB of free storage. Look at both of their websites to find out which one is the best fit for you.