There is a lot of people working to get a decent free Windows emulator for Mac OS X Intel.
Some just want VMWare to launch their player technology, others seek the Q and QEMU solutions. All of this will eventually work, I'm sure.
In the meantime, you can follow the progress of a VMWare-based solution. Aparently someone took the time to make VMWare for linux run under Knoppix using a iMac Intel. That's nice.