Do you remember the wheel o’ icons that John Nack posted on his blog when the CS3 branding first came out? I wasn’t a big fan when I first saw them but they’ve grown on me a lot since then. But right in the middle were a bunch of grey/black icons and right behind the black Fx that we all know and love was an Fb icon for Flex Builder. For some reason that never got used and to this day I don’t know why. So my first reaction to the changing of the name from Flex Builder to Flash Builder is that it’s about damn time.
I came up as a Flex developer. I’m still a Flex developer. If you’ve ever seen me try and demo Flash CS4 you know how much of a trainwreck I am when I’m outside of my precious eclipse-based IDE. In the early days there was a pretty solid line between people doing Flex and people doing Flash. But as Flex Builder evolved, a lot of people started using it for AS3 only projects. The “traditional Flash developer” would move between Flex Builder and Flash CS4 a bit or had started to use Flex Builder as their primary development environment even if they weren’t using the Flex Framework at all. As the Flash Platform has grown up, the types of people using the tool has increased. And that’s what a good tool should do; it should be basic and powerful enough to meet a variety of needs.

So with the name change, we’re acknowledging that the tools for creating Flash content are independent of frameworks or other parts of the Flash Platform. And I don’t see how that’s a bad thing.
Some of the push-back I’ve seen has been from Flex developers who enjoyed a clean break from the perceived baggage of the Flash brand. For you guys, not much is changing. Knowing the Flex Framework inside and out is still going to be a much-demanded skill. You’ll still be able to call yourself a Flex developer, you can still say you know how to build Flex applications and you can still pitch clients on Flex instead of Flash. No one is going to ask you what tool you’re using. The Flex brand still lives. The bigger concern, and one I think is more valid, is one like Constantiner posted:
Ok. What we have now? We have Flash IDE and Flash Builder IDE (looking forward for questions from customers and colleges about what is difference and why Flash Builder IDE has advanced code editor but can’t compile fla-files and Flash IDE can compile them but useless for serious coding?). And we have Flash Catalyst which can use projects imported from Flash Builder IDE but can’t share the same project and can’t edit fla-files. And have one ugly child aka Flex SDK which is what? How to explain colleges and customers why Flash Builder IDE hasn’t timeline and can’t build flas but can use something which called Flex SDK (why Flex? why Flash?). And in other hand Flex SDK can be used to develop only in Flash Builder IDE and Flash Catalyst but not in Flash IDE. And what about beginners? Why Adobe going to drive them mad?
I can tell you after watching this whole experience that at a big company doing something as simple as a name change takes a LOOOOOONNNG time. Let alone trying to take two mature products like Flex Builder and Flash CS4 and get them to work better together. So Constantin is absolutely right when he says that there are still a lot of things that need to happen. But now that the naming is set we’ll keep working on bringing the tools closer together so that you can interchange between all of them as well as the design tools on the Creative Suite side.
I’m less concerned about people figuring out which tool to use. As I see it, here’s the landscape for Adobe’s Flash Platform tools:

The developers to the platform will use Flash Builder, the designers can use Flash Catalyst, and those of you who are creative developer rockstars will continue to use Flash Professional to create some great content.
Hopefully this clarifies the name change a bit. We’re going to be doing a huge user group tour to talk about Flex 4, Flash Builder, Flash Catalyst, and ColdFusion 9 in June, so if you want to find out more, check with your local user group. The long and short of the announcement is that all of your tools and technologies are staying the same, we’re just working on making them play better together.