I just wanted to give you a quick heads-up on my current development efforts: I have begun to work heavily on a message modfication module for rsyslog which will support liblognorm-style normalization inside rsyslog. In git
there already is a branch "lognorm", which I will hopefully complete and merge into master soon. It provides some very interesting shortcuts of pulling specific information out of syslog messages. I'll probably promote it
some more when it is available. IMHO it's the coolest and potentially most valuable feature I have added in the past three years. Once I have enabled tags in liblognorm/libee, you can even very easily classify log messages
based on their content.