Use Appcelerator Titanium to build mobile apps for iPhone & Android and desktop apps for Windows, Mac OS X & Linux from Web technologies

Not having a Mac capable of doing software development has seriously hindered my ability to attempt to create legitimate iPhone applications. Titanium makes some big claims and I am tempted to give it a go to see what all the fuss is about.
If it delivers on its promise, being able to build an application that can be used on iPhone, iPad and Android would be pretty great, especially for a sans-Mac programmer.
I am a tad skeptical as to whether or not software like this would actually be useful for anything terribly complicated. But in those cases, I imagine it would make more sense to actually work at the native software level anyway.
UPDATE
Unfortunately, after digging for the FAQ I discovered that this still requires having access to the Apple SDK so this does not actually help anyone build an application on Windows or Linux. This is really too bad.