I think one of the more intereresting and welcomed bits of info from the interview is:
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"FSX, "Will behave as a professional platform," Shawn said. It is designed to be a flight simulation platform for future development by the add-on community. Much more than any previous version, FSX has features that are sure to thrill the developer community and guaranteed to give us exciting add-ons that far exceed the stock program's already formidable features. We have seen some tantalizing glimpses of things to come and will be reporting on them in detail over the next few months.
Meanwhile, Shawn announced that he hired a professional Software Development Kit designer to create a professional SDK that will be available when FSX releases. His SDK developer is working in parallel with the development team. So developers, you won't have to wait for a year after release to sink your teeth into some juicy add-ons. "I strongly believe the best years in the hobby are ahead of us," Shawn predicted."
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A SDK released when FSX is!