Nice Falcon509

Lets continue having some fun...
I agree with much of what your saying if Russia and the US go to war. For any other scenario, we're talking about a Much smaller number of bombs that are much weaker in strength, so your estimates all get cut by huge amounts in the more realistic scenario Today.
Your scenario is that of Russia attacking the USA with a complete launch of all ICBMs, which is clearly not the case anymore. Not the most likely scenario. China has a growing arsenal, but it is Nothing by comparison to Russia or the USA and as such the level of annhilation is completely different from the modern scenarios.
Over the next 100 years or so this scenario will continue to be viable. After that however, I no longer think the prospect of the US being annhilated exists. By then the missile defense systems will Really be coming into their own (they are already damn good with mass production in several countries under way), and the existing mass arsenal that Russia has will become largely inert as they can't afford to keep it up. Bomb yield size is not going up, and we in the US can't even get agreement to modernize our existing weapons. So I think the era of countries having Thousands and Thousands of bombs is limited to the lifespan of the current arsenal. Start 2 (if approved) will cut that number in half, and it will just keep going down until we get (I think) in the hundreds. Hundreds of bombs is more than an adequate deterrent and won't cost a mint.
In any other scenario (today a much more realistic scenario), we won't take nearly as much damage - it will be a smaller scale exchange with China, a conglomeration of Middle Eastern countries or (most likely) a single bomb set off in NYC or DC. In that scenario, being 30-40 miles away, I suspect the best we will get at this range is alot of wind, some heat and the death of all Electronics (as the EMP will go much further than the blast). In that case I'll be walking home.

Surviving a nuclear war is not a fantasy - it really depends on the scale of the war. Will Fallout help you survive a war? Likely not very much unless folks pay very close attention and take it seriously. Concepts like going underground to avoid radiation, being armed (or protected by those with arms) to survive and adequate food/water supplies will be key factors.