What you need to do is use PenguinBait's tool to clone your install to a SD card. Then you can easily dd the SD card install from a desktop/laptop computer (running Linux) regularly.

console-tools:
http://talk.maemo.org/showthread.php?t=25714

He also has a cool KDE image:
http://talk.maemo.org/showthread.php?t=20317
http://penguinbait.com/

Also check out qole's http://talk.maemo.org/showthread.php?t=34713 easy debian chroot.

Also look up various patches from qwerty12.

I highly recommend getting a 8gb microSD card + microSD->miniSD adapter card. Clone your install to the SD and boot from the SD card. It makes it easier to backup as well as gives you room to grow.

I know you are new to the community so be sure to pick up a USB OTG cable + linksys usb100m ethernet adapter as well if you haven't already.