It may seem from looking at my photostream that outdoor stuff is pretty much all I do. Well, it's not. :-) I do a lot of interior night shots in erm, 'unusual' locations but tend to keep them a bit closer. For the minute anyway.
I find it sometimes more preferable to work indoors; different lighting challenges, totally different atmospheres and ultimately different photos as a result. Here's one such example. It's interesting what exists unseen in your own city.
August 2007 - f16 @ 15 seconds.
Go easy...step lightly. Stay free.