I signed up, and never got around to trying it because the game client was a 50+MB Java WebStart app, and I didn’t have the patience at the time to wait for it to download.
I finally pulled down the newer standalone (install4j. blergh) client (which is also Java based) and waited for it to pull down the 100MBs of Pox Nora client so I could finally give it a try.
I must admit, it’s rather addictive. It’s a rather fun blend of Magic: The Gathering style collection and battlegroup building, mixed with shades of Final Fantasy Tactics and other turn-based battle games.
We’ll see how long this keeps my attention anyway.