Paradox Interactive is now accepting signups for Pirates of Black Cove on this page where you can express your interest in an advance look at this upcoming RTS/RPG hybrid. Signups are being accepted between now and March 31st, and those accepted into the beta will be notified by April 7th. On a related note, there's a recent Pirates of Black Cove Developer Diary on GameZone, and further information on the game is available on its official website. Here's word on the beta:

Paradox Interactive and Nitro Games have today announced details on how to sign up for the limited Closed Beta for their upcoming RTS/RPG Pirates of Black Cove. So prepare for the 16th century, the golden era of pirates! This is your chance to conquer the Caribbean, because Pirates of Black Cove challenge you to roam the open world with your pirate crew. Notoriety and pirate fame bring you closer to your goal to be the King of All Pirates.