Here’s a few categories or Industries which have been revolutionized by Mass Customization:
T-shirts (Threadless & Neighborhoodies)
TV (Youtube & Joost)
Handbags (Elemental Threads)
Journalism (Blogs & podcasting)
Newspapers (RSS)
Job Seeking (Aggregation & feeds)
Book publishing (Lulu)
Tourism (the web in general)
Luxury goods (fractional ownership)
Music (itunes)
Networking (facebook & social apps)
In fact there’s just too many to mention.
But the real question is this: If it hasn’t hit your industry yet, why not and what are you doing about it?