The Flex Builder for Linux alpha bits posted on Adobe Labs have been updated to extend the hardcoded timeout period. The current FB Linux Alpha 4 product will expire on Dec. 1st, 2009, so if you are currently using Flex Builder for Linux be sure to download the updated Alpha 5 bits from Adobe Labs http://labs.adobe.com/technologies/flex/flexbuilder_linux/ prior to Dec. 1st. There are no changes to the functionality of the product in these new bits; however they have been tested on later versions of Linux distros. Please see the release notes http://labs.adobe.com/technologies/flex/flexbuilder_linux/releasenotes.html posted on Adobe Labs for complete details.
Flash Builder 4 is the next evolution of Flex Builder, and includes a long list of feature improvements, new data-centric development features, and a new design-develop workflow with Flash Catalyst. Flash Catalyst, also now available in public beta, is a new interaction design tool for rapidly building application user interfaces without coding. Both Flash Builder and Flash Catalyst are based on the updated Flex 4 framework, also available for beta download.
Visit Adobe Labs to find out more and to download the installers.