Playtech the world's biggest gambling software firm, said on Monday it was highly confident regarding the company's trading performance for 2008 as it reported a jump in fourth-quarter revenues. The UK-based firm said revenues rose 101 percent to $32.7 million in the three months to Dec. 31. Revenues from its casino games division rising to $22.9 million and revenue from its fast-growing online poker software up to $9.4 million. (U.S. revenues were not included.)