I've pretty much locked myself into Windows by using C# to develop my game, but I decided to take a closer look at Mono to see where it stands. Before today, my total lifetime experience with Linux was less than 30 minutes, so figuring out which distro to use and setting it up seemed like a hurdle. To my great surprise, a pre-configured VMWare virtual machine with Suse 10.1, Mono and all the required software is available for dload on the Mono website! Since I already use VMWare for testing, this was a no-brainer, but even if you don't own VMWare, there's a free VMWare player available. It was a hefty 1GB dload (which is smaller than some of the distros I looked at), but I got my C# logging library compiling and running in a test app in less than 20 minutes, at least half of which I spent trying to figure out how to get the source code off my Windows network (Suse has great support for Windows networking, I just didn't know how to open the network browser ) I'm not sure if its ready for prime time yet, but I'll report back later. I'd really like to know if anyone has tried it on Mac OS X.