Kind of looks promising. --Eric Begin forwarded message:

HeaderDoc 8 Public Beta is a tool for generating HTML reference documentation from comments in C, C++, and Objective-C header files. It's written in Perl for easy portability. Similar to JavaDoc, it allows developers to easily document their interfaces and export that information into HTML. HeaderDoc 8 adds many new features, including a new (optional) tagless syntax, code coloring, template-based index pages, improved error checking, man page output, and support for many new languages, including Java, JavaScript, Perl, PHP shell scripts, and Pascal. http://developer.apple.com/darwin/projects/headerdoc