So, finally found a decent setup for developing AS3 with Ubuntu, Flex Builder 3. It's not as good as FDT3, but it's enough to keep going.

Here are some stuff I've been working on since setting everything up... expodoob performance test (I'll give some detail about this project soon), bump test 1, bump test 2.

Many thanks to Thierry Nicola for pointing me on the right direction with his post.