I'm not one to play or even promote video games especially online 'flash' games but I ran across this online game the other day and found it pretty fun. It's called Kingdom Rush by Ironhide Game Studio.
It's a great little concept of protecting a kingdom from invading goblins, orcs, wolves and other creepy things by strategically placing defending towers of soldiers, archers, wizards and bomb flinging dwarves along the road to various towns. Your job is to pretty much prevent the monsters from passing down the road by killing them.
The graphics and animations are fun and it very much has a hint of D&D to it that I think you all would like.