RIA developers, of the Ajax variety in particular, should be excited to see what's coming down the pipe from Adobe's Creative Suite Teams. Dreamweaver has been waiting for a massive overhaul for some time now. It looks like it will really start to fill the void in Ajax tool space. The Live View I think might be the start of that, out of the box code hinting for a few popular Ajax libraries doesn't hurt either. It looks like they're trying to give us some nice prototyping features in Fireworks which sounds kind of interesting too.

Got the betas and more info on Adobe Labs.

What I think is cool in Dreamweaver CS4:

Live View

View your web pages under real-world browser conditions with the new Live View in Dreamweaver — while still retaining direct access to the code. The new rendering mode, which uses the open source rendering engine WebKit, displays your designs like a standards-based browser.

Very cool, this will help very quick iterations between code and runtime.

Code hinting for Ajax and JavaScript frameworks

Write JavaScript more quickly and accurately with improved support for JavaScript core objects and primitive data types. Work with popular JavaScript frameworks including jQuery, Prototype, and Spry.

Subversion integration

Nice to have this out of the box, brings the coding side up to speed with tools such as Aptana and IntelliJ.

Dreamweaver integrates Subversion software for a more robust check-in/check-out experience with file versioning, rollback, and more. Once you’ve defined Subversion as your version control system, you can update your site to get the latest versions of its pages directly from within Dreamweaver; no third-party utility or command-line interface is required

As Serge implied, it's about bloody time!

And on the design side of the house here are my top 3 features for Fireworks CS4:

CSS and Images Export

Design complete web pages in Fireworks’ robust graphic environment, and then export web standards-compliant, CSS-based layouts, complete with external style sheets in one step.

Very nice for accelerating the design to working prototype phase of web app development.

PDF export

Generate high-fidelity, interactive, secure PDF documents from your Fireworks design comps for enhanced client communication.

I don't have hands on experience with this yet, but it holds a lot of promise. Providing interactive PDFs for doing RIA mockups with clients could be a huge time saver...or a huge waste of time depending on how easy it is to do.

AIR authoring

Create your AIR interactive prototype directly within Fireworks, ready to be deployed to HTML and CSS, Flex, or Flash.

Have the option of either Flash or HTML sounds very interesting. Again this could really help figuring out exactly how app is supposed to behave, and possibly with user testing too.

Read more from Andre Charland.