I got my beta key for it last week. It's pretty fun. They've done a great job of mimicking the table-top game experience online. I like the way that a character is a pretty basic set of stats that level up as you advance, but that the real variability and strategy comes from the items that you equip your characters with in the form of action cards. So if you equip your mage with one wand, it will have 3-6 actions with it like lightening bolt or fireball. But a different item will have a different set of cards. So much of how you play depends on how you configure your items.
Mojang (the makers of Minecraft) has a card game called "Scrolls." Looks like a combination of Magic the Gathering and Might & Magic. I know plenty of people who like both/either of those games enough to LOVE this Scrolls.