How Long

Before Macs can run* (legitimately with Apple's blessing / design, or not) classic Windows applications as discrete OS X processes in their own separate windows rather than by using emulation or a virtual machine?

I say before summer 2007.

* By 'run' I mean to imply - properly, acceptably and not requiring a hacked-up, Dilithium Crystal powered 'workaround' with tons of exposed wiring and crocodile clips and stuff and which, without fail, catches fire after precisely 15 seconds of use.