backintime. I am using it, works great, and the restore functions are quite easy to use as well.
I would highly recommend it... the first four books (Enders Game, Speaker for the Dead, Xenocide, and Children of the Mind) are much better than the later concurrent-sequel / whatever you would call them books.
As for the original question... no, I cannot think of anything which could be remotely construed as pornographic; and I would rate myself as quite conservative when it comes to that sort of thing. Violence, mature situations, absolutely. I would say that it is appropriate for kids somewhere around 10 - 12+ years, depending on the child in question.
You can enable some hidden setting somewhere to show hidden files, but then it shows it shows EVERYTHING, including dot files. There's now way to get it to show
Sure you can:
Will they come in black?
Yes, but it will take 2 years and cost three times as much as the white version.
"Gort, klaatu nikto barada." -- The Day the Earth Stood Still