According to the Big N, they had the same idea years ago, but rejected it.
Computer and Video Games recently spoke to a representative at Nintendo to get the company's thoughts on Sony's new HOME feature for the PS3, which allows players to create virtual homes that act as a hub for online content and multiplayer gaming. Brushing it off, they responded with the following:
"This is an example of Sony's "Mii-too" approach. But as Mr. Miyamoto states, Nintendo years ago considered and rejected the type of approach Sony is now taking."
With Nintendo's Mii Channel and Sony's new HOME service, how long until Microsoft enters the fold? Stay tuned to Nintendo World Report for more GDC coverage.