Alaska Auroras.

it's a bit dark and indistinct. this is one of those pictures where it's thrilling just to have captured the phenomenon at all! i totally get that. but to make it a picture that strangers would want to buy and hang on their wall, it needs a bit more. i see some tops of trees in the lower right. i think more of those in the image would have helped give the picture scale and context. also, they'd need to be a lot brighter. i assume you had a massively long exposure time. you could have taken a portable flash unit and flashed the trees during the exposure...the aurora wouldn't have been effected, but the trees would have been brighter.

ior you could have gone the other direction, and had the trees silhouetted by the aurora. either way, right now it's mostly sky we're looking at.

as aurora displays go, it's a relatively mild one. here are some links to a few nice aurora pictures, which i just googled. notice the foreground elements and how they provide context.

http://www.my.opera.com/Mathilda%C2%B4s%20Wallpaper/albums/showpic.dml?album=108126&picture=1484090

http://www.answers.com/topic/aurora-at-fairbanks-alaska-jpg

(that second one is a bit dicey with the crooked shot and fuzzy trees, but you get the idea.)

hope that's helpful!