[Skunkworks] data backup

hi guys, need some advice. I want to backup some sensitive data online. Who offers the best services locally or even internationally.. and is there an open source software that you can recommend for encrypting data. I have also heard of these portable harddisks (500gb, 750gb, 1 terabyte etc) that are used for backing up data. who knows where i can find some that can be locked using a usb key. Thanks in advance