The actual threads on 2ch are long gone, but they've been archived and even translated into english. I got these from the bottom of the wikipedia article..

The original posts in japanese:
http://www.geocities.co.jp/Milkyway-Aquarius/7075/trainman.html

and the english translations:
http://www.rinji.tv/densha/

it's a really fun read, you can really feel the excitement of it all.