If you want to post work you're doing now, go to the WIP Forums (Work-in-Progress). Its categorized for world/regional, city/town, structure, dungeon, maps specifically for Virtual Terrain apps and so on. Pick the category that best fits. General category is for when it doesn't fit any of the others.
Your Sig is no problem, that's what its for.
Welcome to the Guild! Stop being a lurker and participate with us, we prefer that you do.