The new Flash Builder 4 Beta is not available for Linux. However, the Flex Builder for Linux project is still available on labs at http://labs.adobe.com/technologies/flex/flexbuilder_linux/. We have not updated the bits since last summer, but the project is still alive and we continue to monitor the community demand for a Linux product. We do invite developers to actively provide feedback on the current Alpha product to help in this evaluation.
Any progress on the linux version would be appreciated, e.g. official support for Eclipse 3.4 (or even for 3.5 which is due for release very soon)
Im not interested in the design tools which is where i assume you are using native code. Just the code based development tools. editors, debugger, profiler, unit testing stuff etc (and i'll happily pay for them..)
oh and a 64-bit player debug version please.