When I installed Mac OS X on my MSI Wind, one of the key missing features was the lack of WiFi support. Some folks opted to replace the Realtek 802.11b/g module with a compatible one, but I opted to use my EV-DO adapter for connectivity. GottaBeMobile notes that some MSIWind.net forum members are circulating an OS X driver for the Realtek WiFi module and confirm that it works. The driver doesn’t cause OS X to see the hardware as an AirPort card, but apparently, you can still configure the WiFi and get it working. I still have the test version of Windows 7 on my MSI Wind so I haven’t tried the solution, but I did download it for later use.
Bear in mind that the driver is coming from Realtek, not MSI, and that this will always be an unofficial driver since it’s not coming directly from Apple. As a result, it’s unlikely to be supported in case of issues or problems. Somehow that never stops me from tinkering though.