It has been a while since I have opened Flash Builder 4 Beta, but having to fill in the survey for testing, I gave it another shot yesterday.
Downloaded the last build “253292″ from adobe prerelease repository.
I spend like couple of hours reading the docs and trying this and that, there is a lot of improvements, but what really caught my eyes is the tooltip help when you mouse-over a component, it gives you a more detailed information than before.
And what really was a WOW for me is the changes in the Data menu, now with the simple wizard you can create a connection to web service, PHP, BlazeDs, and others.
I tried the PHP one, and it went very smooth, I could even without writing a single line of PHP, enter the database credentials, and select the table I want to have access to from my flex app, and in few click, flex created the service in PHP and the mirroring AS classes, It even downloaded the Zend Framework AMF component.
It is much different than before, I had to do a lot of hard coding to get to this point, now developers will have more time to concentrate on the application itself, rather than on connecting to database and making it work.
It is worth trying and developers should read the migration docs from previous versions to get ready for it when it released.
Download Flash Builder Beta : http://labs.adobe.com/technologies/flashbuilder4/
Flash Builder 4 Migration Doc. : http://livedocs.adobe.com/flex/gumbo/flex4featuresandmigration.pdf