Macenstein posted a strange little tip earlier this week for getting Apple's official apps off of your iPhone (I personally never use the Stocks app, and really don't need it taking up space around the apps I do use). But his method isn't so much a tip as an exploit -- basically, Apple has a secret 10th "page" of Application icons, and Macenstein's method is to put so many apps onto your iPhone that the official ones get squeezed off screen.
It works, though installing 144 apps on your phone might be more trouble than it's worth. And the change isn't even permanent -- restarting or syncing the iPhone will bring the apps back on screen (provided you make room on them -- you could just leave 144 apps up if you wanted, and presumably they'd stay out of the picture).
It's too bad that Apple has never really provided a tool to organize the iPhone's app screen quickly -- stacks have long been suggested as a way to get more icons on there, but it'd be nice to even have an iTunes-based tool to get all those icons in the right places. Until then, you can always fill up all your screens and kick any icons you don't want off of there.