justjimjpc

Here are some links and info for using sdcard to store and run apps on a rooted phone ... This should be more than you found in your searchs


How-to- Root, Hack, and Flashing your G1/Dream Read first!! - xda-developers

Why should you root your Dream/G1?

• You can install a full Linux distribution, like Debian.
• You can run applications that require root, like Screenshot and Auto Rotate your Browser and or any other application.
• You can install the latest Android build directly from the Android source tree.
• Customize your boot image.
• Create full backups of the state of your phone.
• Create custom ROMs.
• Install Applications to your SD Card to save space.
• Use your phone as a tether to connect your computer/laptop to the internet.
• Turn your phone into a wireless router that provides internet access.

Well, hopefully one of those reasons convinced you to get root access on your phone!