Cool plugin. Just a few comments:
1) I liked your example of expandable categories on your page
I'm a n00b, so I just copied and pasted the sample code to the style.css file under "categories". After doing this, the categories are indented, but I'm not seeing the expand / collapse buttons. Do I need to customize the code (which I would need lots of help)? Or is the theme overriding it?
2) Is there a way to duplicate your widget? I want to break out the presentation of the categories, so I want one sidebar widget with a group of categories under it (i.e. computers, PC, electronics, etc)...and then another sidebar widget with a different group of categories under it (i.e. cars, motorcycles, planes, etc). Is this possible?
Thanks again! keep up the good work!