[Plugin: Slick Sitemap] feature suggestion

if possible, I’d like the option of categories in my sitemap showing the number of posts contained, since I don’t plan on having each post show in my sitemap. woudl that be possible?

something like this: http://screencast.com/t/rsRUj8ohNN

http://ww.wp.xz.cn/extend/plugins/slick-sitemap/