OldUse.Net is a historical recreation updated in real time of Usenet as it was 30 years ago, with the classic green-on-black styling. You can read each Usenet post synchronised from the past using a command-line interface or your newsreader via nntp.olduse.net. [just]
Every day that passes will offer another day's worth of posts from 1981. It's a fascinating bit of nostalgia and history.