Lismore Software is currently porting Blue Label, a cheap PC emulator to Mac OS X.
The current version runs only in Mac OS 9 and does not support Windows 2000/XP, only 95/98/NT4. It is $35 and comes with DOS preinstalled. The OS 9 version wasn't as fast as VPC, but much, much faster than Bochs.
Let's hope Blue Label for OS X will really be released, unlike RealPC for OS X...