Blizzard has a Starter Edition for Diablo 3. You're limited to 3 Class, level cap to 13, no season or hardcore access, and Act I story mode.
 
I played for 2 hours and reached my cap, and played 3 more hours to get rare items to look like a pro ;)
I'm waiting for good sales for the Standalone + Expansion (I want access to the Crusader).
Now that you announced Diablo I porting, I'm getting tempted at buying :)

http://cheapdigitaldownload.com/catalogue/search.php?q=Diablo+3&sort=releasedateDesc
 

It might be the only thing that gets me to play the game.... to play diablo 1 again.
 
1 and 2 they did a really good job, but 3 has felt like nothing but a money grab. definitely not as fun as the previous two.