I can't speak to a larger capacity iPod nano, however it is anticipated that Apple will intro an ultra-portable MacBook (sans optical drive) that will incorporate aspects of the iPhone's multi-touch capability, and a new version of iTunes that will provide movie rentals. That said, Steve Jobs is famous for his "...one more thing" coda to every keynote, so its anyone's guess what else is in store. Check out
http://arstechnica.com/journals/apple for the latest updates on Apple.