Good point. Two things to consider about categories. First, categories can only be added two at a time (gotta stay even) and we need graphics for the new categories that are just like that old ones.
ACtually, now that I think about it, it will get to the point where we have too many categories already, and we'll need to sub-categorize. But I think we can afford two more without making too many on the select list .... so what two categories do you think we should add?