The game will sell for $9.99 and include the first expansion pack. It will become available for pre-loading on June 1, but no release date has been given at this time. This should be a nice alternative to Wizards' microtransaction-based Magic: The Gathering Online, which allows players to purchase digital cards and build an online collection.
The PC version will utilize Steamworks for achievements, leaderboards, and, according to Kotaku, multiplayer matchmaking, which would bring online play to the series for the first time. A PlayStation 3 version is planned for release this year.
That's it. My social life is over. ;)