Have BYOND provide a chat server that would be used to replace the pager and could be leveraged by game developers. This would provide BYOND users with real-time chat that could be accessed through the BYOND website or using an existing IM client. It'd also be something that BYOND game developers could use - each game instance could act as an IM client, allowing game players to communicate with other BYOND users in the same game, in different games, or not in a game at all.
You could set up an XMPP server, replace the pager's chat capability with Pidgin, and support communication between BYOND users and Google Talk/Gchat users.
Think about how neat it would be to have things like this happen:
One person downloads a BYOND game and starts playing it by themself. They like the game and decide to invite their friends to join. The game automatically opens a port for hosting and gives the player a byond:// link. The game's chat is connected to BYOND's chat server, so the user can send the byond:// link to their friends whether their friends are in a different game, are connected to another chat server (ex: gchat), or are using some other IM program (ex: Pidgin) that's connected to BYOND's chat server (among others).