I'm not sure if this is the appropriate forum for this request, but it seemed like a good place to start.
I would like to prepare a monthly report on who has accessed my site, when (dates/times), and, if possible, how long their visit lasted. Does CB track this information? Can it? And, if so, how (and where) can I grab this information?
Nope, we are not the "big brothers whatching you " , as already discussed elsewhere.
For general statistics,
phpmyvisites
works fine, installed separately from joomla and needs only a small inclusion to the template you use. But it will not tell you WHO visited your site and when, it will only show you statistics. Google also started a Google Analytics service.