Hi,
Thanks for the continued work on this component. A couple of feature requests!

(1) I'd like to be able to have multiple levels of categories and sub-categories. Should't be too hard to implement but will make life much easier with larger numbers of groups

(2) This would require a bit more work - I'd like to attach "rules" to a group category. At present I can't really think of any other rule except groupsize, but I'd like to be able to have a category where user created groups are limited to a certain number of members.

thanks!
/David