Our art department wants to scan about 1500 35mm slides. We'll be scanning at fairly high resolution, so each file will be around 5MB. We are looking for a digital image library - web-based - which will let us upload and categorize our pictures. We would like something like Flickr or Picassa. We'd like casual user management (single login for the whole school, and a teacher login to edit / change upload slides). Availability is important, as is optimization. We would like to be able to download original file size (like Xanga) or a derivative thereof. We're a school, so inexpensive == good. As this collection of 35mm slides represents the heart of our art department, we are interested in data integrity, and long-term storage. Please contact me here with any suggestions. Thank you!