Mailing the story:
Port Your UNIX® Applications to Linux® — Quickly, Efficiently ...
Increasingly, developers, architects, and project managers face the challenge of porting their C, C++, and Java applications from UNIX to Linux environments. Now, there's a definitive, start-to-finish guide to porting applications from today's most widely used UNIX platforms: Solaris™, HP-UX, and AIX®: UNIX® to Linux® Porting: A Comprehensive Reference.
[Ok, it's a book advertisement. This is not an endorsement. It just looked at least as interesting as some press releases that come through here. -- grouch]