Try it out............... VirtualBox 2.2.0 is here
By User12608895-Oracle on Apr 08, 2009
VirtualBox 2.2.0 is here.
Download from these url links and try it out.
VirtualBox have come a long way and now it has more improvement.
I personal use it on my MacPro, MacBook Pro and Sun Ultra 40.
I use for Solaris, OpenSolaris and other guest operating systems.
And VirtualBox works for me.
I am loving it.