Archive of Archives
Jason Scott runs textfiles.com, an impressive attempt to collect and preserve the electronic bulletin boards that once occupied the mediaspace now filled by e-mail lists and newsgroups. He's also guest-blogging at bOING bOING, where he's just posted an enjoyable assortment of links to other online archives, from the Library of Congress' American Memory site to a collection of old phone phreak zines. Worth a gander.
