Some weeks back there was the CDK5AW, the CDK 5th anniversiry workshop. A small group of international open source chemo-, bioinformatics software developers met, among which two from Sweden. It was then decided to generalize their work resulting in Bioclipse:
It's heavily using the Eclipse Rich Client Platform, making additional plugins trivial. OK, if this does not convinve you: check the screenshots on the Bioclipse website.
It's a killer, really! Ola, Martin: great work!
PS. I am going to try to run it with free Java virtual machines this weekend, but if you have a working solution earlier than that, please leave a comment and screenshot in the comments.