Just in case you didn't know what to do with your weekend. This oughta keep you busy.
Instructions are here.
Building my own Batcave -- transformation vid 10-7-11
And another one some guy's spending $2 Million on. Apparently you get a lifesize Tumbler at that price.
Check the photos
Elite Home Theater Seating - Home Theater Furniture | Home Theater Chairs
and the story
Dark Knight Themed Two Million Dollar Custom Home Theater Unveiled by Elite Home Theater Seating
If you prefer to go '80's style this C3 Corvette Batmobile might be just the thing for ya.