i think u need to keep calm, Firstly. most of the people that is already a xat Users its because they love this method of work..
Secondly we have a power that is called Category < This power is for Users that like put a category friends in their List of Friends.
Thirdly if u have this information, xat works in html5 to make better than now xat.com < they will make this idea in a future, right now its difficult to think about it.
If u make a suggest, u need to know that this suggestion is study by the Admin/Volunteers and if they want to apply anything related with this topic, they will return to this post and read again your suggestion.
Have a nice day! Remember not all of suggestion is made Right now, They will be study by the admin/Volunteers and others staff..