Still available as a free download from WOTC - a 4-page extract of Appendix A: Random Dungeon Generation.

Still available as a free download from WOTC - a 4-page extract of Appendix A: Random Dungeon Generation. This was made available in 2012 as a preview of the reprinted DMG. The webpage linking to it is long gone, but can be viewed in the Internet Archive ---https://web.archive.org/web/20120629233528/http://www.wizards.com:80/DnD/Article.aspx?x=dnd/4ex/20120628

The file iteself is still on the WOTC site -
http://www.wizards.com:80/dnd/files/excerpts/excerpt_dmg4.pdf


http://www.wizards.com:80/dnd/files/excerpts/excerpt_dmg4.pdf