It turns out that Macromedia have plans for server software and that forms are part of a 'rich media experience'.
The name is Flex, as announced at the Flashforward animation event, but aimed at the enterprise.
There is no announcement of a Macromedia presence at Seybold Amsterdam. Maybe they are not yet ready. There might be more information at Seybold San Francisco. So meanwhile we need the web as well. Macromedia may have given up on real time events.