Call me a Neanderthal, but I'm totally new to the whole "cloud" thing. My understanding is that your data is stored "somewhere" and accessible anytime you have an internet connection. Sounds pretty cool, but do any of you techie guys have any security reservations about it? IOW, do you TRUST it with anything sensitive at all or only for frivolous stuff like books, music, pics, etc.?

I ask because I'm exploring the capabilities of the Kindle Fire I recently got (love it so far) and 5G of free cloud storage is included.