I think that for netbooks, it is a viable idea
--if you trust Google, I don't particularly, as I expect them to be mining everything possible about my surfing habits, the better to reinforce their advertising partners..http://eyeos.org/
Actually I guess I feel the same way about cloud computing in general, I just don't like the idea that confidential information/data will be kept at a web site, and I just can't trust any company or government policy to protect private information
--especially when I have seen how cavalier with customer data, both Governments (IRS), Insurance companies, banks and others who do not seem to believe that having customer/client personal information/data in an easily accessible form, available to a myriad group of employees is anything to be concerned about.
And I do consider NAD (name & address) data to be confidential, in this age of cybercrime and identity theft
--companies don't of course, as they see it as data to be mined, and know that security (human & machine) costs, and might interfere with a laissez-faire position
I think the only way I would consider it is if I could ensure that I could encrypt the data before it was transmitted to their site, not at their site or during a transfer process..