When I want a secure, offline paper wallet, currently I boot to a USB flash drive running with a bootable Ubuntu Live-CD distro and load from that same drive a copy of the page from BitAddress.org
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http://BitAddress.orgThough this seems a trivial effort, it is disruptive to me if I have to first shut down, reboot, print, reboot and then log back in to get back to the point I was at when I wanted to create the paper wallet.
If I had a spare computer lying around I'ld use that but at the moment I don't.
In the near future, however, I might have a Raspberry Pi around.
I've not touched one of these yet nor learned much about them either but I'm supposing this unit could be useful as a paper wallet generator. BitAddress has everything that is needed 100% in Javascript so the technical complexity to build this should be low. Though there would need to be an alternative to wiggling the mouse for gathering entropy with this.
But for something inexpensive that would let you create a paper wallet and print it out, this seems to be capable.
It might have even more use if it could print paper wallets on demand like tickets. I could see using a $50 printer like the Brother QL 700, for instance, where the first ticket / printout is the private key and QR code, followed by a second printout that has the public key and its QR code. (Though I now wonder if thermal paper printouts will fade and become too obscure to scan, as time passes?)
So together, for under $100 of hardware, an individual would have an offline bitcoin paper wallet generator.
Or at least an excuse to order a Raspberry Pi.