http://www.pbase.com/ths/aurora
I just got a Nikon D70 last week, used the kit 18-70 lens. For a suburban area with a lot of ground light, not to mention Chicago nearby, I was happy with these shots.
Supposed to happen again this evening, check out http://www.spaceweather.com to see if your area may get it too.
We rarely see the aurora in the Chicago area, last night was a real treat.
Enjoy!
Tom