[JBuilder Hour #1 (replay)]
http://dn.codegear.com/article/33964
によりますと、
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aohlsson:jkaster: "Will JBuilder 2007 be available on Linux or the Mac?" - It will. We're working on an R2 release for this spring. Automatic update for all SA customers. This release will support Windows, Linux and Mac.
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とのことです。