I switched from Parallels when Parallels started sucking AND THEN wanted more money for me to upgrade to 3.x. VirtualBox, back then, was anemic but functional.

I switched from Parallels when Parallels started sucking AND THEN wanted more money for me to upgrade to 3.x. VirtualBox, back then, was anemic but functional. Now, it's really going places with features that still trail behind the commercial brands you know and love, but when you consider it's free, it's hard to complain too much.