(Disclosure, I work for nCrypted Cloud) Since you ask and since you appear to be a Dropbox user looking for more security, check out www.ncryptedcloud.com It

(Disclosure, I work for nCrypted Cloud) Since you ask and since you appear to be a Dropbox user looking for more security, check out www.ncryptedcloud.com It is a Privacy, Security and Collaboration app that layers on top of dropbox (Skydrive and Googledrive soon)