I am a frequent user of Nmon and since I live on Linux Ive always thought it was kind of a pain to analyze Nmon log files without the use of the Excel Macro. So I put together a python nmon analyzer.
Its still a work in progress, but here is a link the tool: https://github.com/madmaze/pyNmonAnalyzer
I also put together a quick getting started: http://matthiaslee.com/node/38
Hope this is of use to someone,
Enrique Sanchez Vela
I've see the reports and they look pretty good, have you announced the tool at the developerworks forums? if not, I'd suggest you do.
here is the link in case you don't have it.