I have some invites for LLOOGG (http://www.lloogg.com).
It's a free web stat / counter that can show a lots of info about visitors, in near real time. I'm using it by some times (in addition to StatCounter (http://www.statcounter.com), best free web stat service, IMHO) and it's quite nice & informative.
If you want an invite to try it, just post or PM a suitable mail address to witch to send the invite.
Bye!