I haven't seen many discussions about the security in the cloud here, but perhaps I just browsed wrong topics...
Well, whatever the case, here's another one

Two days ago Dropbox had another security failure. Reportedly, hackers used third-party website passwords to access Dropbox accounts. They say the number of the hacked account is small, but I believe they have a very relative notion of "small number" considering the fact that they recently reached 50 million users. I use Dropbox to store documents that are not particularly important, but I guess I'd be worried if I had something confidential there. Perhaps this is the reason Dropbox is mostly used by individuals rather than enterprises - not many businesses would trust their files to a poorly secured service and this seems to be the image most of the businesses have about Dropbox. They obviously haven't forgot the 4hrs failure last year.

Oh, well. I personally wouldn't judge Dropbox as much because I believe these things are bound to happen every now and then. I'll probably continue using it, but if I had something extremely confidential I'd probably make sure to either encrypt it properly or use some other storage service.

Here's a more detailed article on this.

And if you have any opinions about this, I'd really like to hear them
Do you even use Dropbox? Have you tried SugarSync, Wuala, Google Drive?