[Edit] I lied -- it seems the latest version does allow you to DirectSync folders across accounts, so I'm sold on cubby Smiley

Original post:

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The only problem with cubby is it won't let you have a shared sync folder with friends/family having different accounts, without having the data stored in the cloud.

With skydrive you can share a folder but the client won't let you sync that folder locally:(

Has anyone found other alternatives?