While there is an /away command, and the auto-reply indicates this status in it\'s reply, there currently is no way of telling whether a player is /away except by sending a /tell.
This isn\'t very convenient, because in most cases sending a /tell isn\'t appropriate or wanted.
Therefore, I propose to include
1) a different color (yellow) for entries on the buddy list while the player is /away. It may or may not warrant a system message like when a player joins or quits, but this might be personal taste and thus configurable.
2) a visual indication of the model ingame. This is especially important for random encounters which you wish to talk to in normal chat, which sould be the prefered way anyway.
This couls be done by simply having the player go translucent like the inactive windows, but should in the end be designated by the player model doing something special, like sitting down with eyes closed or something like this.
This has been somewhat discussed on a thread asking for AFK shops, but IMO there should be such an indication without setting up a shop, and the two should be different so that shops, should they ever be implemented, don\'t visually conflict with general AFK-ness.
Edit: I know that such an indication might be seen as an invitation to indirect PK, i.e., if you see an AFK player, you can try to get a nonster close to them and hope it will turn on them, but OTOH, this can be prevented by the engine (i.e., a player who is AFK and doesn\'t perform any actions (to prevent abuse of AFK) won\'t be attacked by new monsters (attacks that have been going on before would continue just normally, also to prevent AFK abuse)), and abusive players are able to find out anyway.