100Mb is big. Really, really big. Currently we discourage such a large size because there are very, very few cases were such a size is warranted (outside of, as you say, graphics intensive resources). Typically for an article that's being provided to teach or to give you a component or framework, any large videos or images can be replaces with far smaller placeholders. Large downloads mean large bandwidth costs and can affect site performance. However, we will be opening this up very soon.
cheers, Chris Maunder The Code Project | Co-founder Microsoft C++ MVP