One issue that seems to persist in discussions in the DC Forum relating to aspects of cloud-storage is the safety/security of your data whilst it is in cloud-storage.
These discussions sometimes referred to Wuala, which has been discussed quite a bit on the DC forum, but seems to have been mainly "in passing".
I found some interesting links on this post: SkyDrive storage space land grab for grandfathers
One of them was in reference to Wuala.
So, today I followed the link in sciencetext and took a look at the Wuala site: Wuala - FREE 6Gb offer.
And I watched the simple Wuala - Promo Video
It's about a guy (John) who is concerned about his data security, after being bitten. (Maybe his data was on dotcom, or something, and he lost it all.)
Wuala looks like it is good tech and encrypted as well.