Innactive category

I have noticed that a particular category went unreviewed from 8-04 to 1-05. After review, no new sites were added. Is that normal? I am obviously watching for my own site to be reviewed, and the lack of activity is frustrating... Anybody have any ideas why?

Because no one felt like editing there during that time? Seriously, if no one is inspired to review sites in a category, it will wait until someone is.

Editing involves a lot of maintenance tasks like correcting existing listings, removing bad listings, or adding symlinks to other categories. Any of those activities will cause the Last Updated date to change and that would be the kind of thing that happened in the category you were looking at.