If you're looking for a really quick and easy way to view your log files and share them online for free check out this visualization tool:
http://www.tableausoftware.com/public/community Simply open you .CSV file and drag and drop your different parameters into the view, you can overlay as many as you want. If you have very long log files you can drill down into the time series you are interested in by using Time (msec) as a quickfilter.
I've made a sample here:
http://public.tableausoftware.com/views/ODB2/LGT121512?:embed=y Best part is anyone can download the workbook and use it as a template for their own data, simply "Replace Data Source" and then share it online.
Hope this helps and happy tuning.