It is easy!
Pick one of the cool panos on the 360cities network, click the pano thumbnail and on the opened page find note <embed>, which is located under small frame with panorama. Click on this note, after that the html code will be generated. Paste it into your blog post or website and – voila! You have the panp embedded!
Sample:
Panorama is displayed with Flash 9 viewer, 99% of your visitors will see it!