I already see the demotions coming. But keep in mind that games are known to be an excellent way to learn new software and it's features. It also helps in brand recognition. (c.f. BrickBreaker) Let go of reality for a moment and envision this:
A person in Tampa clicks opens Notes and opens an application that says "Chess" on the icon. They see a list of games in progress. If they open one of the games they can see the current board position as well as the history of moves. They click on a view that has a list of players looking to start a game, in order by rank based on previous games. They select a player and begin a game. As moves are made they are replicated and their opponent in Sydney responds with their moves the next day. And so the game goes...
IBM changed it from File - Database - Open to File - Application - Open for a reason. I'm not saying turn life at work into a gaming session. But as Brick Breaker is to the BlackBerry, there should be a signature game in Notes. A game could be a great way to get people to better realize the power of Notes. It is a well known fact that games are one of the best ways to learn and to help people become comfortable with things that are new to them (like software). A well-written game can be a great tool to encourage users to explore the features in the software that might give them that competitive advantage (in the game as well as in their daily work). The new generation entering the workforce is particularly receptive to this style of learning.
I used Chess in my example because it is well known, but the actual game is irrelevant. What is relevant is that it comes from IBM and is the common thread that everyone thinks of when they think of Notes games, just like BrickBreaker.