Pex posted some update notes over on the official forums:

Items & Marketplace

• Duelist on Demand - you can now print your very own TCG card!
• Kart Driver and Demolition Driver decals have been added to the Marketplace to spruce up your wheels!

General

• Free Realms goes international! German, French, Spanish & UK English language options have been added

Another cool feature ZAM has noticed that wasn't mentioned in the notes is customizable Key Bindings! To customize your bindings, click on the gear in the upper right-hand corner in game, choose Game Options, and then choose Key Bindings.