Best Way to Port a Windows Game to Linux?

cliffski asks: "I have a Windows game that may benefit from a port to Linux. It's a complex politics sim based on a neural network, (think NationStates with complexity) and is probably right up the street of many Linux gamers. The problem right now is that I don't have the knowledge or the time to handle a Linux port, myself. What's the best way to arrange for a commercial port of games software to the Linux platform? Is it worth talking to lone enthusiastic hackers about collaborating? Would I save myself a lot of hassle by selling the porting rights to an established Linux games company?"