As an experiment, we made this interesting tool for Web proxy log analisys and statistic reporting:
http://wiki.mikrotik.com/wiki/Proxylizer
Enjoy and report your opinion!
Chance of a windows port ??
Only just noticed this today, will be starting trials of it on monday as it should be very handy for reporting 
Thanks MT!
it’s impossible because there is no cron analog, which could do these specific things that are required. it’s windows after all
Well, as much as I can understand you’re leaning towards Linux:
Of course there’s something like cron for Windows (and has been there for ages). As far as a quick glance over the introduction to Proxylizer shows, you are just using cron to run the background report generation and importing syslog files to SQL - right? No problem there.
Use Kiwi Syslog (or whatever you like) as syslog server on windows.
So it shouldn’t be too hard to run Proxylizer on Windows (or make it run there with slight modifications). No time to try right now, though…
believe me, we investigated all options for windows, i’m not making this up
OK - now you’ve waken up my ambition 
I’m not saying that it’s not possible at all. We would have to change the method of how the database is updated. It’s possible if there will be enough demand
Task Scheduler? O_o
As far as database update with proxy log data…
Look at open source syslog2ODBC…
It is a open source (source forge) syslog server that dumps the records to SLQ or other ODBC datasource…
For report generarion, I dont know if they are on the fly reports or genetated by a schedualed task..
Hmmmm…