i am using your plugin still in a very early version since the update broke my site.
The early version only breaks my db server if too many users visit my site :-)
I was looking for a different plugin to do the job (e.g. http://wordpress.org/plugins/user-stats/) until i found out, that you are working on a redesign.
The most important question concerning V2 is, if it will be compatible with caching plugins like W3 Total Cache? I really need to cache my page, otherwise the server will go down with high traffic. If it will work with cached sites, i will wait for version 2 of you plugin.
Besides some problems with bigger databeses: THANKS FOR THE JOB YOU DO! I am well aware that the maintenance of such a plugin takes a lot of time!