nothing more to add.

oh well, there is. i still think shiva is easier and faster than unity. i ran unity's kitchen demo again today -> 23 fps with all lights on, on a dual core and a geforce 7600gt. that can't be it.
aaaand shiva's iPhone engine is already running (unity's iphone port is only announced) and they have an application in the appstore for free download, they are already in the top ten with more than 200.000 downloads.