I came across this post and thought I add some information about new developments. I am a member of the
phpLogCon team. PhpLogCon is a web-based syslog front-end which facilitates searching, analyzing and graphing syslog and other network event data. It is free open source software distributed under the GPLv3.
As it is actively being developed, we would appreciate feedback on this tool as well as suggestions for future development. The tool is available from the above-mentioned site, and an online demo can be found at
http://demo.phplogcon.org.
I hope this is useful information. Feedback on the project is deeply appreciated.