QUOTE (yesferatu @ Nov 16 2010, 02:11 PM)

Do you use them?
How much do you let your hackers get?
Do you reveal sections of the map as they explore them?
1.) Yes. Maps and other visuals are a great way to build immersion
2.) Very little. Perhaps if the runners did some SERIOUS legwork and tracked down the construction company who built the place, did a pre-shadowrun there to get the actual plans. It is too powerful of an advantage for the PCs. That said, I don't really like Dungeoun-Delve type adventures where the PCs need to explore the whole damned building in order to find what Mr. Johnson is after. Usually the plotline provides clues as to where things might be, for example, Mr. Johnson tells them the prototype is on the 3rd sub-floor in the R&D Cyber-labs. That prevents you from needing to draw-out the whole damned map for an entire corporate HQ.
3.) Yes. The Fog-of-War is important to maintain.
I've either covered the map in another full sheet of paper and cut-out sections with a scissor, or printed-out 3 different maps: 1 exterior, one interior with the walls shown but no interiors listed (good for when the mage astrally projects into the building), and one with all the details in-place. I use MS Visio to draw things so I can easily create different versions of the same building.