Where do I post loadable extensions questions? (semi-multi-part)

Hi, Is there a better list for posting question about creating loadable extensions (.so) for PHP? Or is this [php-general] the best place to post? Also, I saw a post on another PHP related site that said this was not C, but some kind of C macro language? - - but you can use real C code? Confusing... Can someone define more clearly what I am actually writing? I have successfully recreated the demo extension found in the manual, and have created/compiled some other basic "modules" with only minor problems/guesswork involved. At this point, I am limited by lack of documentation in the PHP manual, and my lack of knowledge of C. I am picking it up [C] rather quickly due to just not being a novice at programming (ie. PHPing since early '98). I have found no other source code examples of modules except the one in the manual. Does anyone have any links or samples? Thanks, Kristophari