I think this would work in the InfoWindow…
I'd probably geocode the street address to get a latitude and longitude and then use the Streetview API to return the image.
<img src="http://maps.googleapis.com/maps/api/streetview?size=300x300&location=' + <ADD LAT> + ',%20' + <ADD LONG> + '&fov=90&heading=235&pitch=10&sensor=false" />