Here you will find various papers and presentations.

Doing More With Less: Nessus
by Christian Houle CISSP, TICSA

Managing Data Center Functions with Open Source Tools
Jascha’s 2003 Comdex presentation. Some information is a bit dated, but here for those requesting it.

L.A.S. SecTool Reviews and Howtos:

kismet/gkismet
by Joe Burke GSEC, MCP, Linux+

nbtscan
by Christian Houle CISSP, TICSA

scanssh
by Christian Houle CISSP, TICSA

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NOTE: You will need a .pdf viewer to open these documents.
A few good viewers are Xpdf and Abode Reader.

(More papers and presentations on the way. . .)