Hi I use the nextgen gallery for sites with many images but I ran into someone who needs similar features within the Core WordPress Media Library.
All they need is a way to sort and categorize images when they upload them.
That way when they need to find the image again in a month or year they can just go to Add Media then Fruit and find a picture of a Strawberry
Rather then hunting for 25 minutes for that image they previously uploaded.
I saw a couple plugins for the Media Library but I am not sure they will work well.. This person will need to upgrade to High Traffic Services .. maybe go to a CDN or Go to WordPress VIP Services...
Trying to keep the site real simple because I am Converting from a different CMS Platform and just learning WP will be enough for them to say hmmm this is too difficult I just want to make posts..