The only thing that I would like to add would be the ability to extend the WOL count to external (none UBB) areas of your site.
I have turned my site around so it is now working from within the UBB scripts, just so that I can show user's on my index page amongst others. Before this I was using a script that worked on templates to build and update my listings pages via cron but I could not get the WOL to show visitors to these areas. I would say that 75 to 80% of my traffic was outside of the UBB so was never accounted for. Now, even though I don't like the functionality of my site very much and have had to make some cut backs, I know that all of my traffic is registered by WOL.