Everything colonel dekker listed what he uses the netbook for he can get done in linux, either way truespace works through wine pretty good. This is why linux has live cd's. Use the
unetbootin utility, along with an ubuntu iso, and a memory card or usb flash drive. Then give linux a spin via live cd via mobile flash memory on your netbook.
I don't recommend dual booting unless you truly need too. The idea that someone would use one os more than the other is sort of dumb. For linux there's thousands of free programs that can take up the slack for what you're looking for, after that wine may support the program you keep switching over to windows for if there truly is no linux equivalent. Other than that, if you use one more than the other, then just use the one you use more often all the time (this is why people shouldn't care for dual boot unless there's a legitimate purpose for it aside from trying out an os ocasionaly).
Anyway, ubuntu isn't crippled, you can change your wallpaper in it, and if you must, theme it to look like windows 7 (this really ****s with other people's heads

). Anyway, there's a little help in the direction of how to put a livecd on mobile flash memory.