Applications don't take up much space, and will be installed in the builtin memory. Being a unix operating system, applications typically go into directories like /bin, /usr/bin/, /usrl/local/bin, etc. You can't easily move these directories onto your SD cards.

It's your media files that will typically reside on SD: music, videos, pictures, maps, etc.

I've had my N800 for a little over a week now. I immediately updated to OS2008 as it had just been released, so don't know how the N800 operated with OS2007. I do not have a power problem. You don't have to shut it down when you are done as it uses very little power when running. You can put it in offline mode (turns off wifi and bluetooth) to save more power if you want. On my N800, I press the power button briefly and get a pop up menu. Offline mode is one of the options. You could also lock the screen so that it doesn't turn on if accidently touched. I only shut down if something isn't working right and I want to reboot. After shutting down, leave it alone for 10-20 seconds before trying to power it back on. Also, I've heard people have trouble with it powering off and on with it plugged in, so I do this from the battery only.

Funny little device. It definitely has it's wierd quirks.

-steve