3 outlet surge protector, with 2 USB outlets. Hmm.. I usually have 2 usb powered devices, and this would be perfect for LISA, or the airport, where you can never find an outlet. People never mind splitting a power jack, but object horribly if you want to unplug their device/laptop :)
This might just be small enough to not mind carrying when traveling.. Nice!
(Yes, it's an easy question - 3 & 5. It also forms the basis of all current public key encryption systems.. aka what we use to make all secure communications on the internet. They just need to add qubits to the calculator. Probably not easy... and will take a few years.. but ...