After spending 3 days trying to get Elipse PDT and the Zend debugger working on Mac OS X, my nerves were very frayed, indeed. Apparently, there has been an ongoing problem with the Zend debugger not stopping at breakpoints on Mac Intel machines...something that has plagued Eclipse through 3 different PHP extensions. (don't even get me started on how crazy it is that Eclipse has seen three completely separate PHP plugins within less than a year)
In the end all was not lost. On the contrary, after enough scratching around Google I discovered what I needed to know. Komodo has become the semi-de-facto IDE of choice for many Drupal developers. A fact confirmed for me when I saw many familiar names from the Drupal community on the ActiveState website (itself a Drupal site).
Suffice to say with Komodo I got local and remote debugging up and running within just a couple hours, and it's been a total dream to use.
So now I have a proper debugger, integrated svn, and last but not least, Drupal api code compeletion/documentation is included. And if that's not enough, it uses 100mb+ less memory than Eclipse did.
Komodo is going to set me back a few bucks ($295) after my trial runs out, but even at that price it's a no-brainer for some who makes their living with Drupal and PHP. Kudos to ActiveState on their outreach to the Drupal community.
Some useful links if your interested in checking out Komodo: