I came across a how-to guide for running Android 1.7 in a virtual machine (VirtualBox), but 1.7 is old. I haven't been able to find a Android 2.2 or 2.3 image anywhere, does anyone have any ideas on how to virtualize newer Android OS's? Preferably a free virtualization solution like VirtualBox.

Here is the link about virtualizing 1.7:

http://osxdaily.com/2010/12/14/run-android-using-a-virtual-machine-on-a-mac-or-windows-pc/

They send you to here to download Android disk images:

http://virtualboxes.org/images/android-x86/

But I can't find anything newer than 1.7, anyone have any ideas?