I discovered two eclipse plugins for Flex / Flash Development:
Joa Ebert released a FBDT, a plugin to create Pixel Bender filters that is compatible for Flash CS4, Photoshop CS4 Extended, and After Effects CS4. (I attended last Saturday’s workshop with Lee Brimelow and he mentioned that there are some limitations to Pixel Bender development for Flash CS4 [e.g. no loops] in coding the pixel bender filters.) Since most developers use an external IDE e.g. Eclipse, this is very ideal instead of using the one that Adobe provides.