you got me interested so i did a little googling and this was posted on another forum.....

** summary of thread ** http://www.photozo.com/forum/viewtopic.php?t=1587
yes it can damage your camera, not just yours but any camera film or digital can be damaged by taking photos of the suns / sunset etc
** eof summary **

they also go on to talk of some different ways to avoid damage etc...

hope this helped... this was just the first link off of my google search, if anyone has some more experience i would love to hear how you kept your camera from being damaged while taking pictures of eclipses or sunsets etc.... we have a cool picture at my house of an eclipse and it would be sweet to know what was done to prevent the damage ( the way the pros do it?? )