Shape of AirTunes to Come?

I was thinking of setting up a home music system based around AirTunes / Airport Express, to unleash my digitial music on the neighbors.
But then I wondered if there might be some updates or new goodies on the horizon. New airport express? Apple remote? Wireless iPod integration?? Apple branded remote speakers with airport cards???
Does anyone have any info / insights - or should I just invest in whats going on now?