This is not about a service that allow you to backup your harddrive online. I want the ability to take my online self, my online “files” and online “harddrive” so to speak, and download it as a backup on to my own harddrive.
Someone should build a lightweight desktop application into which I can put my username and password for Google, Facebook, MySpace, WordPress, Flickr, Digg, etc. and as soon as there some change (as defined by me, the user) it downloads this change onto my harddrive as a backup. This simple app would then save all of my GMail email, all of my Google Docs and Spreadsheets as word docs and excel files, Google Calendar meetings and alerts as iCal data, Google Reader Feeds in xml, all of my friends from Facebook, all of my pictures from Facebook, my pics from Flickr, blog posts from WordPress, etc.
Then if I ever decided to move my data somewhere I could change it into common file formats for other programs and start quickly without losing any history or any data. Or if Google ever banned my account (as they have accidentally for some other people in the recent past) at least I still have all of my data and am not crippled.
I would probably pay for a product like this because the permanent peace of mind is worth $50.