For now it probably is, but I can imagine the following in the future (if there is a chat channel available):
- Werewolf chat, I have a lot of good experiences with this. The games are mostly fast and fun.
- Diplomacy, diplomacy phase by chat and email, current maps are shown possible trough the site or a dedicated other site.
In both cases I volunteer to lead the games, I have enough experience with both.
And there are lots of other games that can be played through a channel. (I have some plans to adapt Advanced Civilization for pbem. But I need to work out the trade phase).