I use wp-shortstat (actually a heavily modified version of it). When I updated to WP2, it stopped logging stats. Not sure why it is not logging any stats.
I switched back to the original to make sure it wasn’t one of my modifications, but it didn’t log stats either.
I dropped the two tables, and let the program re-create them. It did re-create them, but still doesn’t log stats.
I am not sure if their is problem with the tracking hook: add_action(‘shutdown’, array(&$wpss, ‘track’)); I did a search, and the shutdown thing still seems to be used in WP2.

I have read other people have had problems with shortstat and WP2, but not the same logging problem. Anyone else have any ideas?