We have just launched a new site at work today. www.omnova.com. The interesting part of this launch is the use of a new server application called Macromedia Flex. You can get to the application part of this site by going to www.omnova.com/designcenter. The Flex application allows for a rich internet user interface to be generated through remote data access points.
We had many issues getting this application to work in specific environments. Many of these issues were based on both the types of browsers and how they render css or div tags, and also firewall / permissions.
The site utilizes a few technologies. ASPX, Flex, and Macromedia Contribute.
You can read more about the issues here at one of our developers blogs (http://www.merhl.com/webdevblog/index.php?itemid=26)