Is Mac OS X a viable developer platform?

Over the years, philosophically, Builder.com has been platform-neutral in its coverage of application development environments. However, in practical terms, coverage of the Apple Computer universe has been sparse to say the least. With the release of Mac OS X, sporting a kernel based on BSD UNIX, the question arises?Is Mac OS X a development environment Builder.com should be addressing with tools and articles? What should Builder.com cover with regard to Mac OS X?