IGN just posted a nice interview with Spore creator Will Wright. He talks about development of the title and the possibilities of cross-platform pollenation. Here is the Wii/DS highlight of the interview:

IGN: Do you have any ideas of how the game would play on the Wii?

Wright: We’ve been messing around with the Wii dev kit and we’re really interested in the possibilities there. It’s possible the editors might be more manageable on that system. The DS is also very interesting to us, as its control scheme could be very manageable for the game.

He seems rather optimistic about both Wii and the DS. In the interview, he also talks about the possibility of communication between platforms and player-created content. Follow the link for the full interview.

Source: IGN Wii