The Vintage Web is a website by Veronica Belmont and Ryan Block that chronicles the worst transgressors in current web taste.
As Kottke says, it's mostly "screenshots of sites whose current design appears to have not been updated since the 1990s."
Oh the tables! The 90's color schemes! The flat grey buttons with the rounded corners! It's all there, untouched, as if Clinton was still president.(From Kottke)