The workshop is, allegedly, where set and props and other stuff is built yet because it's so often full of set or just random crap (set) it doesn't get used for this and is instead used for storing random crap (set).
The workshop sprung into existence in 2005/6.
The workshop was tidied to the point of near usability over Christmas 2007/08 by Mal, Larking and some other good folks. There are now specific storage areas for plywood (both large sheets and small sheet) and more or less comprehensive system for storing the wood in a more or less neat and organised way, loads of work bench space, new shelves, draws and so on. Lots of stuff was thrown out. It felt good.
The floor of the workshop is clear as off January 7th 2008. There's no good reason why this shouldn't always be the case.
The hole in the floor was fixed on January 6th 2008. It's not super strong but should be fine. Don't push your luck and it won't push yours. There's nothing beneath that section of the floor except the very thin plasterboard ceiling. Going through it would be bad. Do not be tempted. Honestly, it's more likely that the floorboards around the hole will fail before the plywood and it's supports do.