Gumbo will be Flash Builder 4 - but you already know that!
Looks like the proverbial cat is already out of the bag on this, but due to some technical difficulties last night this post never appeared. Alas, it sounds as though the reaction from folks has been positive! So, here's my take on the new name for the next version of Flex Builder.
It's been somewhat challenging to deal with one codename for both the upcoming version of Flex Builder and Flex SDK. We've been referring to both as Gumbo, but as you know the IDE and the framework are really two separate parts of the overall Flash platform. So today we're going to not only clarify these upcoming versions, but also bring some additional clarity to the products' naming.
The next version of Flex Builder will be named Flash Builder 4. It will be the same Eclipse-based IDE with a new name and lots of great new features. This is a name change to the commercial product only, and does not affect the Flex framework or Flex SDK. Flex is the open source framework at the core of the Flash Platform, including Flash Builder and Flash Catalyst.
What does this mean for you as a Flex developer? Just more amazing features in the next release. You're still a Flex developer. A person who uses Dreamweaver to create HTML content for a browser isn't called a Dreamweaver developer; he or she is called an HTML developer. It's the same with Flash Builder; you use the Flash Builder tool to write applications using the Flex framework or pure ActionScript for applications that will run in Flash or AIR. And Flex Builder 3 is still Flex Builder 3.
Of course, for me this release is about a lot more than a clarification on the branding. We have an incredible release on its way with killer features for designer/developer workflow, data centric development, and coding productivity and improved testing and deployment capabilities. You can experience it all for yourself with the upcoming Beta of Flash Builder 4 on Adobe Labs: watch for it this summer. I can't wait to see what you do with these releases! Tim
source: http://www.buntel.com/blog/index.cfm/2009/5/16/Gumbo-will-be-Flash-Builder-4--but-you-already-know-that