I have just finished developing a KRpano server that allows photographers to easily upload panoramas and build virtual tours with ease. There is no more need for knowing XML. This blows away anything 360cities offers. You can add Music, Video, Sound files, photo galleries, Hot Spots and much more. These are the best transitions out there. They load faster then anything I have seen. You can sign up for a two week trial at http://www.virtualsincpro.com
Here is a sample I built. This hotel includes about 90 virtual scenes and was built with this new back office.
http://www.virtualsinc.com/v4/index.php?tour=15
Please send me your feedback.