I use PhpED 8+ hrs every day at work and love it. Here's just a few minor suggestions coming from using it so much.
Javascript code folding quick-links on the side bar. I know this is much requested, but it would be a very basic feature to implement. Just match opening and closing brackets and allow them to be collapsed. Here's a regular expression to get you started . /{[^}]*}/g
Allow us to adjust the order of the code-insight dialog. For example, putting methods and voids before defines. Currently typing "pri" in a PHP file gives you all functions and defines dealing with actually using a printer, not functions like print() and print_r(). It's be nice to get all the functions first, since now I just have to leave DEFINE unchecked.
Make the debugger more like a command prompt (or firebug). For example, in the "Immediate" tab, it'd be nice to be able to hit the up arrow to get the last command entered. Also variables entered through the Immediate tab don't show up in the Locals, Globals, or Watch lists.
Example
Auto-updater. This one is probably the biggest request, but it'd make my life soooo much easier. I hate having to close out of the program to install a new update, its lost productivity time.
Anyway, awesome program. Keep up the good work