In the past with Windows Server 2003 I was able to ship the event logs to a central network syslog server using evtsys (https://engineering.purdue.edu/ECN/Resources/Documents/UNIX/evtsys). It does not mention support for Server 2008 but does mention problems with sending Windows Vista logs.
Are there any good services/utilities or even PowerShell scripts (preferably one of the other ones as this wouldn't be continuous) that could send the event logs to a central syslog server?
You could use Snare for Windows, a free software (freeware), released under the terms of the GNU Public Licence (GPL).
Check this out: http://www.ashleyknowles.net/2009/10/windows-2003-2008-event-logging-to-syslog/