Going...going...
A list of things that arn't very old that 20 somethings probably wouldn't even know about:
Ned's Atomic Dustbin
The Orb
The Charlatans
The Levellers
The Smashing Pumpkins
Suede
The KLF
The X files
The Shamen
Mark Morrison
Portishead
Generation X
The Lemonheads
Sky Magazine
Sandra Bernhardt
River Phoenix
The Farm
Father Ted
Alan Partridge
The Word
Game On
Terry Christian
Twin Peaks
Beavis and Butthead
Eva Herzigova
Eldorado
...not saying I liked many of them (I HATED the Levellers), just that I can imagine plenty of kids who are 20 now who were 5 or 6 at the time and wouldn't know anything about this stuff. I'm sure Ned's Atomic Dustbin must be due a comeback by now