I have developed an administrator application for controlling digital signage schedule, adding videos to program, alerting screens, adding new digital signage boxes and many other features, administrator app had many custome versions for different enterprise users.

I have started developing enterprise medical store with Flex 2, with server side asp.net c# web services and sql server 2005 but while my client was getting smarter although I load everything dynamic, it cost me 498 kb for main app so I decided not to make all, ( Adobe fixed that size compression problem with Flex 3. In Flex 2 try to compile just given empty project you'll see that your compiled app bigger than 100kb that was a problem with low bandwith connections )

I have developed myspace like custom music site with Flex 2.0 just for database class. In this project server side technology was Php/mysql. I have used Flex 2, so messaging with server was XML.