[mark_l_watson]

What do you use as a Dropbox alternative?

[Gurrewe]

I would recommend BitTorrent Sync [1] for personal usage.

[1] - http://www.bittorrent.com/sync

[nilved]

If you're going to use proprietary software you might as well just use Dropbox.

[NameNickHN]

Not if the transfer is encrypted and the files are stored on your own server.

[kybernetyk]

Sparkle Share.