At least to U.S. residents.

Here's the official statement from their site:

This Site is not accessible to Residents of the United States of America. Neither the Service Providers nor Devilfish Poker Limited intend by their continued operation of the Devilfishpoker Site to solicit wagers or custom of any kind from Residents of the United States of America (including such Residents seeking to make use of the Site whilst temporarily resident outside the United States). Any attempt by United States Residents to make use of the Devilfishpoker Site will result in their account(s) being closed down without warning.

Thank you, Republicans.

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"You gonna bark all day, little doggie, or are you gonna bite?" - Mr. Blonde from Reservoir Dogs