Diablo 3 froze today but it was the first time it happened to me. I just restarted the game and it didn't occur again.
Are you sure it didn't freeze before 1.0.4? Did you change anything with your computer software or hardware?
Be sure to submit a ticket at battle.net to the developers.
I think some peoples settings got reset after the patch. Maybe it upped your video settings and your video card is working too hard and eventually crashes. Just something to check, might not be helpful.