iBuilder, a nifty new project by rotem25, allows you to select from a large list of items for your iPhone, and create a package which can then be added to your internalPackages in iPwnage and used to create a custom firmware for your iPhone.
You can then use iTunes to simply restore your iPhone to the new firmware, with all your favorite apps, sources, or packages already in there. Pretty cool...
You can download it here: iBuilder
