Worthwhile iBook memory upgrade

I would NEVER scoff at one who has the wisdom and fortitude to still swear by their trusty Clamshell. Man, I love my Clamshell! I have the 466Mhz DV edition and I use it every day. I use it on the Windoze network here at work for program editing, graphics and - of course - listening to the Mac Geek Gab. It works great at home on the wireless network. I, too, upgraded to 576Mb of RAM and even put in a 120GB hard drive. The only thing that bugs me is being limited to 800x600. Oh, and the battery. It's pretty lame. I've got a lot of old stuff, and a computer is as good as what it does. I was even able to force an install of GarageBand, but it's pretty limited. Max that baby out and drive it like you stole it.