Yesterday was indeed a very sad day for me. No offense, but I actually like Iced Earth even more than the mighty Testament (although Iced Earth IMO hasn't released something as good as New Order...yet!).
I do not consider this to be the end if Iced Earth, though. Matt was indeed a great singer, but I still admire them for their music, not only for their fabolous singer. Jon will probably find a solid replacement, I know he never includes crappy musicians in his band.