When editing a wiki page, you will also have the option of leaving the editor and attaching files instead.
Attaching files is quite simple, you just upload them and if you are feeling creative, give them a brief description. For the most part, this is for illustrating wiki entries with images (using =Description) or links to files (!Description).
This page has an attachment named "Test Image", which we can display in two ways:
or Test Image
Note: only a select few file-types will be accepted by the wiki at this point in time. Also, your e-mail address is linked to each uploaded file - so if you upload something nasty we will know who to blame...