I gave in and bought it. Even with 1 gig of ram and a GeForce 7800 GT, I can easily play with low settings, usually getting between 30-50 frames per second. I could probably even handle medium as long as I keep shaders off. I was planning on getting more ram soon anyway. I don't think I need a new graphics card yet. It's still more than good enough for any other game I own.
I haven't played too much of it yet. I started with a Necromancer, got to level 9, then started a Barbarian. Killing was a little slow with the Necromancer, and the Pet AI could use a little work. Also, if you send your pets in first, the enemy will still ignore them and go straight for you, so they can't tank at all. My zombies weren't even very strong, though the higher level pets are sure to be stronger. I do love that you can have more than one pet with you at a time though.
Even though they made the Barbarian a rogue type, I can still take plenty of hits. I was killing so much faster than I was as a Necromancer, and If I position right, I can easily kill 4 enemies as fast as I can kill 1. My Barbarian is also only level 9, but I got there in half the time. I'll be sticking with this class for now.
"I got kicked off the high school debate team for saying 'Yeah? Well, **** you!'
... I thought I had won."