Please do read the "Media-Use Agreement" on that page first. These are the terms you're agreeing to when submitting a media contribution.
If your photos depict art, we need the name of the piece and the piece's creator/s in order to credit them appropriately. If there are any people depicted in your photos, please be sure you have their explicit permission to post their photos online.
If you want to contribute a large number of files, you can contact media@burningflipside.com, but we'll need all the information requested on that form either way.