So it seems that the Camel guys over at FuseSource has finally released the preview of the Camel development IDE. Basically an eclipse plugin that helps you author the spring xml files for your routes visually. I haven't tried it yet, but its an interesting tool which hopefully can help attract integrators into this nice framework.
There's already a short introduction up on their site, so head on to http://fusesource.com/ and have a look.
According to FuseSource they're also working on a runtime web version which you could use to inspect and author your flows directly against an executing ServiceMix/Karaf JVM.
So with Spring Integration having visual IDE support in their latest release of the STS tooling and Camel joining now it will be interesting to see what the Mule guys will bring to the table when it comes to IDE's. A sneak peak last year showed something similar (http://blogs.mulesoft.org/new-mule-ide-coming/) and you can also have a look at Saddle IDE which seems to target Mule developers as well (http://www.saddle-integration.org/).
Seems like all of them are going the XML-authoring way where your IDE generates XML configs in the background.
2011 already looks like a promising year for integration developers!