LiveAndroid is a LiveCD(and LiveUSB) for Google Android OS running on x86 platforms, you can running it in virtualbox or vmware, also burn the image to a disc. With LiveAndroid you can explore all the features of Google Android without buying a Google Android powered mobile phone like T-Mobile G1 HTC Hero. LiveAndroid allows you to download a LiveCD/LiveUSB of the Google Android operating system. Just burn the image to a disc, insert it in a CD-ROM drive, and reboot your computer and you can explore Android.
Screenshots of Google Android LiveCD
If you want to use Android LiveCD disc image without rebooting your computer then you may use it in a virtualization application like VirtualBox or Microsoft Virtual PC.
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Google Android liveCD v0.2 (ISO Image 1) | Google Android liveCD v0.2 (ISO Image 2)
Google Android liveUSB v0.2 (ISO Image 1) |Google Android liveUSB v0.2 (ISO Image 2)