Can I secure a Mac's ad hoc network better than just the default WEP? I have created an Ad Hoc network broadcasting from my iMac. Since I am on a University Campus I think it is likely that at least a few people know how to crack WEP. Is there any way on Mac to use WPA? I know it is possible with Windows.
I agree the hardware should handle it.

Apple says:  http://docs.info.apple.com/article.html?path=Mac/10.6/en/8339.html

Apple really just wants you to buy an AirPort Extreme or Express.