to the right person it is worth something. I already have one in my collection, otherwise I'd see about buying it off you. I am not a fan of making benches out of vintage/collectable boards, unless you can do it so you don't have to drill thru the board.
was that thomas' actual board or did you sticker it like that? Those are all of his old sponsors, and he used to have religious fish stickers on his boards also. If it's truly thomas' it would be worth a bit more. And I would not turn that into a bench if it was his. But wakeboard prices don't command the dollars that the best vintage skateboards/snowboards/surfboards bring in.
You can donate it to the Wakebaording Hall of Fame. We are building a collection to document the history of the sport. Think "hard rocK" but for wakeboarding.