The stats data dumps are available here: http://dammit.lt/wikistats/
This page shows the most popular articles (Dec '10):
Interesting, though I can't figure out for the life of me what Special:Export/Robert L. Bradley, Jr and Special:Export/William Kurtz Wimsatt, Jr are doing there.
(Robert L Bradley Jr: http://en.wikipedia.org/wiki/Robert_L._Bradley,_Jr.
William Kurtz Wimsatt, jr: http://en.wikipedia.org/wiki/William_Kurtz_Wimsatt,_Jr.)
I agree that seeing page view counts on a weekly or monthly basis would be interesting. I'll add a feature to http://toolserver.org/~emw/wikistats/ so that users can "bin" view counts for pages into weekly or monthly (or arbitrary-time length) units. If you have other feature requests, please keep them coming.