As far as I know, there is currently no way to resize Garageband 09, so that it fits on a small screen. Changing screen scaling in the garageband plist doesn't work for some reason.
As mentioned in the other thread Garageband 08 works "ok"....
If you need iLife 08, check your local mac dealer. I know that the local independent mac dealer here still had some old stock when I was there.
I myself was curious about using the netbook as a portable tool to do 4 channel live recordings of jam sessions and gigs.
I may end up using Audacity, if I can find a good sounding, small, external audio interface.
The mini's (9 & 10) internal audio is basically crap... like almost all computers. For good audio, in my opinion, you need an external audio interface.