I neglected to mention a book I look forward to reading -- Essential SNMP, 2nd Ed by Douglas Mauro and Kevin Schmidt. Most of the technologies I deploy and use are passive monitoring systems. This book represents an active monitoring system, where SNMP is used to determine the status of network resources. I expect Wolfgang Barth's book on Nagios to also be helpful.
Since mentioning the new Apress MySQL book yesterday, MySQL 5 is achieved general availability status with version 5.0.15. I expect the FreeBSD port will be updated shortly.