Cisco released their 2008 Annual Security report.
http://cisco.com/en/US/prod/vpndevc/annual_security_report.html
It is a good report highlighting security threats and trends.
This is fairly comprehensive. Its 52 pages in length and very well done.
They have chapter on Security Risks and trends, data loss, Human Factors,
Insider Threats, Issues of trust, vulnerabilities, Geopolitical and
political conflicts, Countering Internet Security Threats and a
Conclusion chapter.
Of course they couldn't cover everything but for a good review
of the kinds of things that happened in the last year from an
Internet based perspective this is a very good report to read.