in blockland, you could go to a GUI, type a friends name or I.D., it will search all of blocklands I.D., and give you either related or exact name. This is benifical to "Popularity", "Ranking" for trading cards, and less "go to server X so i can friend you.". Plus, this system would be maximized if it also tell you if the player is online and which server he/she is on.
This is optional but a friends list would also go nice on fourms 2.