Soldak Entertainments latest offering, Din's Legacy, now has a demo available for anyone to download. At 340mb it's easy on the bandwidth and won't take long to fire up.
There's no time limit on the demo, however you won't be able to progress beyond level 6. I'm unclear if your progress from the demo will carry over to the full game however.
I thought Din's Legacy was pretty good in my recent preview, so now anyone can give the game a test run. It's a solid action-rpg with it's own unique ideas that scratch your looter itch if other titles aren't doing it for you.