I read today on InsideRIA that the first beta of Flash Catalyst is available for download on Adobe Labs!
I’ve been both sceptical and excited about Catalyst in previous posts, so it’ll be very interesting to try it out for real! 
I’ll probably post my initial thoughts on it sometime soon.
EDIT: The Beta 1 of the new Flash Builder (aka Gumbo) is also out. Ryan Stewart posted another blog about the two releases.