If 1 gig is enough then it seems dropbox gives just the desired fucntion; a storage space synced up to a golden copy which allows sharing between multiple user's.

Granted, the issue I have with dropbox is very similar to the issue with Google:
- Dropbox can access your data. It's not properly encrypted on the client side before transfer.
- Dropbox can recover your password. Passwords are not properly stored in a non-reversable hash.
- Dropbox stores your data under US laws which means your privacy can "legally" be invaded if you live in a country with more saine/strict privacy laws.

But.. it provides a free gig of storage and it's here now so you don't need to wait for Google to develop and release a service.

Note. a popular aproach is to use Dropbox to store one's Truecrypt volume file which puts data control back in the hands of the user with a proper client side encryption option.