Are there any Mac IM clients that allow nested groups?

Question

I have an iBook and a PC that I've built myself. In Windows, both Trillian and Miranda IM allow nested groups (meaning, groups within groups -- like sub-directories, or sub-folders). I have so many contacts (250-something), that I find it hard to find who I am looking for without nested groups.

Answer 1

Being looking everywhere..and nothing, sorry.