Portalarium, the games publisher/developer and service provider of a 3D plugin for social games on Facebook, announced a $2.4 million round of funding today. This brings the company’s total funding up to $3.6 million.

The Austin-based company is the latest venture from game developer and entrepreneur Richard Garriott, known for his work on the Ultima PC game series and the massively multiplayer game, Ultima Online. He founded Portalarium with the intent to bring premium social games to the web. So far, the company has launched two games, Port Casino Poker and Port Casino Blackjack, to Facebook and hi5. Neither game appears to have found much traffic on those platforms, however, Port Casino Poker recently launched on iPad and has an iPhone/Android version planned for release later this year.

Meanwhile, Portalarium also licenses a 3D plugin to other social game developers, which we recently saw for the first time in A Mystical Land, developed by Mad Otter Games. Portalarium says it plan to announce its new game this summer.

This round of funding was led by m8 Capital with participation from Founders Fund. The former focuses exclusive on mobile technology investments, while Founders Fund contributed to Portalarium’s first round.