The Monaco Facebook page has news that Monaco: What's Yours Is Mine is now available on Steam (the post is from 20 hours ago, so forgive our flexible use of the term "now"). Here's the official rundown on the game:

Monaco: What's Yours Is Mine is a single player or co-op heist game. Assemble a crack team of thieves, case the joint, and pull off the perfect heist.

• The Locksmith: Blue-collar infiltration expert
• The Lookout: She can see and hear everything... a natural leader
• The Pickpocket: A hobo with a monkey and a penchant for crime
• The Cleaner: A silent psychopath... Jack The Ripper in pink
• The Mole: Big and dumb... likes to tunnel
• The Gentleman: He doesn't always wear a disguise, but when he does, he looks fantastic
• The Hacker: Armies of viruses shut down security... a modern day warlock
• The Redhead: Manipulative and murderous... a lady always gets what she wants

Play with up to four people online or on the same screen. Compete with others via daily leaderboards. Find out why it won the 2010 IGF and has been described by Rev3Games's Anthony Carboni as "quite possibly the best co-op ever."