The Masters is a stodgy old event in some ways, but it's certainly out front when it comes to its Internet offerings. Besides the fine Masters.org site, you may want to check out AT&T's "Blue Room" this year. You'll be able to see live play by play coverage before the broadcast, including live video of Amen Corner and the practice range. The site will also have lots of player interviews.
This is one of my favorite weeks of the year. Better than the Super Bowl.