Just saw this on the Wired site – (Flex Builder has been renamed Flash Builder). They’re both free for now. Full release is expected later in the year.
I’m keen to take a look at working with Catalyst so I’ll be downloading tonight to try it all out.
So Catalyst appears to be an open beta (as long as you remember to plug in the license key they helpfully provide) but Flash Builder is limited to 30 days unless you already have a license for 3 which is a bit of a shame.
I downloaded Catalyst and got it started with one of the tutorials on the Adobe site but Lee Brimelow of the flash blog has two videos walking through a Catalyst and FlashBuilder project posted at gotoandlearn. Here’s a link to the post. They’ve got lots of detail so you get a good idea of the sort of things that can be done.