Ben Forta posted on his blog about how the Macromedia is supporting the CFEclipse project. Damon Cooper is leading an effort to support RDS in the Eclipse IDE.
If you have not tried Eclipse yet, I highly recommend downloading it from eclipse.org. It is a open source and free IDE with a plugin system that allows anyone to add additional funtionality to it.
It looks like Macromedia is trying to point designers back at Dreamweaver, and point coders to Eclipse.