The article says the games where nearly lost when the company shuttered it's doors in '96.
It is scary how easily we can lose huge chunks of digital history unless thoughtful people make the effort to preserve it.
Could any of these be easily/legally ported as iPhone games? (perhaps with titles changed)
No to all possible interpretations of that question.
Kudos to the Atari Historical Society for saving this code and releasing it! I cut my teeth on Atari 800 6502 assembly code, and spent many hours playing these very games wondering how they wrote them.
Looking at this makes me both nostalgic about asm and thankful that I don't have to write any enterprise applications in it.
The guys who wrote that code were probably thankful they didn't have to write any "enterprise" applications.