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We have heard all of these same old arguments for not doing space but they are wrong...

Marketing space to the general public
Efforts to win greater support for space exploration among the general public have largely failed. Jeff Krukin believes that advocates can do a better job making space relevant to the average person.
Monday, September 13, 2004

Instead, they fight against our tired and dated pro-space arguments with their tired and dated anti-space arguments, such as:

We need to solve our problems here first
Space is too dangerous and expensive
Space is a pristine environment and humans will only ruin it
No nuclear power in space
No property ownership in space

Why has this happened, and what must we understand to effectively market space to the general public?

Most of the G forces are a part of the burn speed and duration. There is on going military research into lower burn rates for solids. Adding none fuel agents that just burn would be a way to tame it down but the length of the segments would most likely need to be increased. Also changing the diameter to one that is smaller would have a simular effect.
I am wondering what effect of changing the output nozzle would have if it were an areospike style?

You forgot on the RLV side the refurb cost of tile replacement, systems upgrades and or part replacements do to being broken or worn out.

Why is there no secondary backup unit on board for such a critical item?

Yup you are right re-read at the bottom of the article about the redesigned and of an American design in the works but 4 years plus before it will be available down from the 6.

The new devices will not use the liquid-gel electrolyte system that has led to all previous units eventually breaking down. Instead, they will rely on a solid polymer electrolyte.

With Nasa budget issues I thing that the later date is more the target rather than the shorter one.

Design of such a device is a must for long duration flight to mars.

Question for ISS unit, What is being done with the extra Hydrogen given off by the current units, Is it being collected and reused as well? Also how much over the period of time of operation is available for other uses?

A very long way to nudge an icy body it really needs to be more of a stoney one though to do what you are thinking of. But maybe multiple ones would do even if they are small ones. Maybe some of the other near earth objects would fill in for the icy jupiter body instead.

I think one of the problems was the need for super conducting electrical wires to get the magnetic field strength high enough to make it propel fast enough.

But with the UN as the seat of power I feel that we will have the same problems as we do today with America for the most part becoming the police force of the world with resistance from the UN when it comes to enforcement for crimes committed by other nation. I May be wrong but that is how it seems.

Quite the feat for these Engineer to Build a Robot That Walks on Water, The  prototype shows how important lighter and stronger materials have been to robotics.
http://story.news.yahoo.com/news?tm....g_robot

Here is another write up:
Aerospace Daily & Defense Report
Budget Cuts Would Severely Hinder Exploration, O'Keefe Says
http://www.aviationnow.com/avnow....104.xml

I find the CEV Image choice interesting by them.

One mans garbage is another mans treasure. It is all based on need or sometimes greed but not to mention resourcefulness of the would be treasure trove hunter to create something that can be sold for cash from another mans trash.

Well that also assumes lawfull ownership by nations to all hardware ever brought there by that particular nation. Russia mught not like it if we were to play salvage with ther stuff and I am sure the same would hold true for Nasa with all the apollo flags and foot prints, ect... However possesion out there would probably 9 tenths of the law but when and if you returned you might face charges if laws were passed against it. What is ownership? In space is a very tricky issue that needs better definitions IMO....