This website http://www.campin.net/syslog-ng/faq.html has amble information on syslog-ng. It also collected a goodly number of links on various log processing information:

• WHAT IS SYSLOG? (fairly lengthy)
• Syslog-ng homepage
• Syslog-ng mailing list signup
• Efficient Syslog Centralization using PostgreSQL + Syslog-NG
• Centralized syslog-ng to mysql database
• syslog(-ng) to postgreSQL database howto
• Sample syslog-ng conf file
• Sample Solaris 8 syslog-ng conf file (for syslog-ng 1.5.x or higher)
• Sample debian syslog-ng conf file to replace the stock syslogd
• An expanded sample syslog-ng conf file
• Centralized Syslog Loghost using syslog-ng
• Log Analysis Resources (LogAnalysis mailing list)
• Building Secure Servers with Linux, 'Chapter 10: System Log Management and Monitoring'
• RFC3164, The BSD syslog Protocol
• CERT India's doc on implementing a central syslog architecture using syslog-ng
• Mick's syslog-ng chroot howto
• Syslog-ng 1.6.7 package for Solaris 10, Sparc platform
• Splunk Base - a place to troubleshoot log entries