Darrell Etherington:
When it comes to OS virtualization on a Mac, there are two major contenders for the title of virtualizer to end all virtualizers.
Likely Parallels and VMware Fusion need no introduction [...], but you might not be aware of what the latest incarnations that both programs bring to the table. VMware Fusion 2, released in September, and Parallels Desktop 4.0, just released today, have a few new tricks up their sleeves.
Spoiler: They both tie and Etherington likes VMware Fusion 2 as a personal preference.