http://www.nasaimages.org/

This web site is a new addition to the internet. To quote the "about" page...
NASA Images is a service of Internet Archive ( www.archive.org ), a non-profit library, to offer public access to NASA's images, videos and audio collections. NASA Images is constantly growing with the addition of current media from NASA as well as newly digitized media from the archives of the NASA Centers.

This is a great service. NASA has produced miles of film and video footage, photos galore and enough audio to fill many, many iPods. The biggest problem in making it available to the public is manpower. If you think it's hard for NASA to get money to keep the shuttle flying, just consider how they might be able to fund all those unnecessary things, such as staff to establish a web accessible archive. However, now with Internet Archive on the job, this rich melange of NASA history and universal beauty is very accessible. It's easily searched and simple to navigate. You can create a workspace to play in before you make decisions on downloading. For the professional and the amateur, it's a delight and something past due.

So...go, play, enjoy. After all, you helped pay for it. It belongs to you too.