Eggy is Furnarchy's version of a Message Center or Whisper Center.
You can add multiple groups here, along with individual contacts. Launch whisper windows, add and delete users, and view your logfiles from the default eggy window. Eggy stores the last time they were online, and their last description for ease-of-use. (You must have seen them online and must have clicked on them for these features to work, respectively.)
Individual whisper windows offer you the ability to accept/decline/send summon and join requests, ignore users, add or remove them from your Eggy list, or even open a multi-person chat. Other Eggy Users can be invited to these multiple person-chats as well.