How about Jitter and MoS too? What about being able to do your own equation?

We're working on our upcoming "Pro" release, which ships with all the above (including standard deviation). See our "teaser" for this on the news page at http://www.pingplotter.com/news.html.

Thanks for the suggestion!

- Pete

P.S. You can export your data and calculate the Std Dev using Excel. We have a knowledgebase article on this at http://www.nessoft.com/kb/18.