By now, we can send and receive Facebook Chat messages.
The plugin will update the online buddy list from the server every
1.5 minutes, although it's said that the buddy list will be refreshed
every 3 minutes at the server end.
Nevertheless there are still many details should be taken care of, e.g.:
* the online status of the buddies who were online(but are not online anymore);
* the displaynames in the chatroom window;
* the useless code that should be removed;
* more runtime conditions that should be concerned.
I want to know what the other additional features do you want to be
implemented, e.g. typing status notification.