A storm 200km NE of me this night produced some spectacular sprites. 2 I witnessed were amazing with the naked eye extending 20 degrees vertically and looking like bright auroral rays/search light beams. They would have been obvious to the naked eye even for a non-astronomer. Unfortunately I did not capture this with the camera (it was point too far have the camera pointed in the correct direction). Having repointed the camera I was still able to capture quite a bright sprite from the same storm (attached). I am currently uploading some more picks at the following gallery:
http://www.pbase.com/terrylovejoy/sprite__dec_17_2005