An excellent image on APOD today, showing an animated GIF of Titan rotating. The images were taken by the Cassini spacecraft in Infrared light.
An interesting fact I didn't previously know, or think about, is that Titan's rotation is locked, always showing the same face to Saturn - the same as our own moon.
See the pic here:
http://antwrp.gsfc.nasa.gov/apod/ap060215.html