Adobe Flash Builder 4  (formely  Flex Builder 4 ) and Adobe Flash Catalyst are out on Adobe Labs going to download and try them out before posting a proper review meanwhile more info on Ryan Stewart’s blog and Andrew Shorten’s Tutorial

Flash Builder 4 delivers a long list of new features, plus improvements to many existing features.There are three main themes to this release: developer productivity, designer-developer workflow, and data-centric application development. For an overview of the features included in this first public beta release, please read Tim Buntel’s What’s New in Flash Builder 4 article and watch the new feature videos. As always, the Flex 4 framework is included within Flash Builder, so please also read Matt Chotin’s What’s New in the Flex 4 SDK article.

Adobe® Flash® Catalyst™ is a new professional interaction design tool for rapidly creating user interfaces without coding.

• Transform artwork created in Adobe Photoshop® and Adobe Illustrator® into functional user interfaces.
• Create interactive prototypes with the ability to leverage them in the final product
• Publish a finished project as a SWF file ready for distribution
• Work more efficiently with developers who use Adobe Flash Builder™ 4 to create rich Internet applications (RIAs). Designers use Flash Catalyst to create the functional user experience then provide the project file to developers who use Flash Builder to add functionality and integrate with servers and services.

Go get Flash Builder 4

Go get Flash Catalyst
Flash Builder 4 Standalone Installer

• Download Flash Builder 4 Installer for Windows (EXE, 285 MB)
• Download Flash Builder 4 Installer for Macintosh (DMG, 277 MB)

Flash Builder 4 Plugin for Eclipse

• Download Flash Builder 4 Plugin for Windows (EXE, 314 MB)
• Download Flash Builder 4 Plugin for Macintosh (DMG, 306 MB)

Flex Component Kit for Adobe Flash Professional CS4

• Download Flex Component Kit for Flash Professional CS4 (ZIP, 224 KB)

Flex 4 Test Automation Plug-in

• Download Flex 4 Test Automation Plug-in (ZIP, 390 KB)
• Download Flex 4 Test Automation Demonstration (ZIP, 7.2 MB)

Flash Catalyst Beta

• Download Flash Catalyst for Windows (EXE, 292 MB)
• Download Flash Catalyst for Macintosh (DMG, 335 MB)

More Adobe Resources:
Learn about Flash Builder 4

• Video: Introducing Flash Builder 4
  Discover new design-centric, data-centric, and developer productivity features in the beta.
• Tutorial: What’s New in Flash Builder 4
  Learn about the three main feature themes in this release.
• Resources: Flex for ColdFusion developers Learning Center
  Explore the new data-centric development features of Flash Builder 4 beta.

Learn about Flex 4 SDK

• Tutorial: What’s New in Flex 4 SDK
  Learn what you’ll find as you explore the Flex 4 SDK beta.
• Tutorial: Differences between Flex 3 SDK and Flex 4 SDK
  Learn about the differences in architecture, components, layouts, use of states, and effects.
• Tutorial: Effects in Adobe Flex 4 SDK ― Part 1: Basic Effects
  See the basic infrastructure of the new effects in this release.

Working with Flash Builder 4

• Video: Developer Productivity in Flash Builder 4
  Presenter: David Zuckerman; Adobe
• Video: Handling Large Recordsets in Flash Builder 4
  Presenter: Tim Buntel; Adobe
• Video: Debug and Test Code in Flash Builder 4
  Presenter: David Zuckerman; Adobe
• Video: Work with Flex 4 SDK in Flash Builder 4
  Presenter: David Zuckerman; Adobe
• Video: PHP Services in Flash Builder 4 (Part 1)
  Presenter: Tom Lane; Adobe
• Video: PHP Services in Flash Builder 4 (Part 2)
  Presenter: Tom Lane; Adobe

The Adobe Flash Builder 4 and Flash Catalyst public beta available on Adobe Labs by David Gamez, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial 2.5 Mexico License.