Yes, Virginia, there is a Delphi MacOSX and Linux project...
I guess the proverbial cat is now out of the bag. As was shown in the Delphi/C++Builder roadmap at Delphi Live!, Project X has been under way for a while now. So now you know some of the reason why things have been rather quiet here since I could not really talk about what I'm working on. The good news is that we now have a returning top-shelf engineer working on the compiler. This person was heavily involved with the original Delphi on Linux project, so there is a lot of institutional knowledge that he's able to bring to the table. Things are going to be done
Another noteworthy item is that the information in the roadmap was more about future technology rather than specific releases. In fact, for the first time in nearly as long as I can remember, we literally have several parallel efforts going on. Unlike the previous Delphi on Linux era where the teams were bounced back and forth between the Windows and Linux projects, we're keeping a smaller, more focused team engaged on "future" work with minimal distractions. Of course the "next" product release will always engage the majority of the team, but having several "background threads" of development adds a truly exciting dynamic to the team.
So if you're at all interested in some tidbits of information about the technology behind Project X and some interesting insight into a lot of the really low-level bit-twiddley aspects of the Delphi compiler and how it integrates with a new platform (and even an "old" platform like Linux) you really must check out Eli Boling's new blog. In fact, he's already starting posting some pretty gnarly stuff about some of the more goofy aspects of the Mac OS. Oh, and if you know the definitive answer to this question on Stack Overflow, please post it there.
So strap in, hang on, it's going to be an interesting ride :-).