Now that the bottles are fully biodegradable, will people have no guilt about tossing them everywhere knowing they will biodegrade? Sounds like it will just generate more litter.

If you do a lot of sysadmin work, choose a topic that interests you, and find some kind of chart or table or data set that you would like to memorize. For example, you could choose capital cities and states, countries and their capitals, wire gauge to diameter, etc.

      After a while of using that password each time, you will be able to remember all kinds of esoteric table data and amaze your friends at cocktail parties when you can recite the capital of every country on the globe, or what year many famous scientists were born.

      Since you have to spend the effort remembering data, why not make the data something useful that you would like to remember for other applications?

Not unless you count ALL web browsing as a waste, most email, and perhaps reading in general. Let's see, I also have spreadsheets that I keep (and maintain) on my iPad, To Do lists, Keynote presentations (admittedly created on my Mac), a calculator, financial information programs, sketchpad, and a thousand research PDFs (Papers), and yes, games. Sure, I won't be running R on my iPad, but I can easily do my thinking and research on it... And goof-off when I need to.

All in a convenient form-factor, free from the awkward, desktop-inspired keyboard, narrow-view screen, and short battery life of a netbook. Freedom from the desktop/laptop/netbook awkwardness is a feature.

Buh? An iPod is capable of providing higher quality audio than any of the internet radio streams offer, so what are you talking about?

And you do realize that "obscure" and "secret" have different meanings, right?
In a usual encryption scheme, the algorithm is public (or possibly obscure) and the key is secret.
With physical access to the device however, you can't really do better than obscurity, although some physical devices are really well protected.