Universal CPU replacement.
Super-duper operating system.
Cold fusion in a briefcase.
Interplanetary hotline to benevolent aliens.
And now...
A radiation-neutralizer. Or at least a method of absorbing/concentrating the radionucleides to sequester them from the environment. Could be a GMO version of bamboo, or a species of radiation-damage-resistant biologically-magnifying mollusc, an algae that not only tolerates but thrives near and incorporates radioactive particles, a retrovirus DNA treatment to regrow cells damaged due to accumulated RADs, nanobots that physically repair biological RAD damage, or a spin-off from a failed cold-fusion program that actually dampens the decay rate of the deadly isotopes (foreshadowing of the nuclear damper of the Traveller era).
Any of these would give a heavily-nuked nation a big lead in recovery, restoring the health, safety, and/or productivity (as in land made arable once more) much sooner than one's competitors.
Oh, and the DNA or the nanobots might serve nicely as a "miracle" in conjunction with the Black Madonna, or just about any wandering "holy man". And who, including the KGB, CIA, DIA, GRU, New America, NSA, etc, wouldn't want dibs on the "fountain of youth"?
