I've been thinking for the past year now that they SHOULD build one more orbiter. If it had the same 20 to 25 year lifespan that the other orbiters had, that would eliminate the gap in manned access to space for the U.S. AND give us the ability to continue to put large cargoes into orbit when the other orbiters are retired but before the Ares V is finished. The final shuttle would only have to fly for about 10 years.

Space Shuttles - First flights (and real and hypothetical retirement dates)
Atlantis - 1985 (2010) 25 yrs.
Columbia - 1981 (Exploded on re-entry - 2003)
Challenger - 1983 (Exploded after launch - 1986)
Discovery - 1984 (2009) 25 yrs.
Endeavor - 1992 (2012) 20 yrs.
Enterprise - (Test model only. Never launched)
New Shuttle -> Intrepid - (March 2010 to March 2020) 10 yrs.
----------------------------------------
2012 to 2020 - 2 Space Shuttles until in 2012, 1 until 2020


2008 - Atlantis, Discovery, Endeavor
2009- Atlantis, Endeavor,
2010- Endeavor, Intrepid
2011- Endeavor, Intrepid
2012- Endeavor, Intrepid
2013 to 2020 - Intrepid

No sense in doing that. Even with all of the tooling available and in pristine shape, it would take a lot more time and money than it's worth to set it all back up again, resurrect all of the drawings and manufacturing plans, turn on the suppliers (many of whom are probably no longer in existence, or no longer produce the 1970's-era items in question), and roll another one off the line.

Like resurrecting the Saturn V, it's not as easy as it might seem at first.

But even if it were practical to build more, it misses the point that a shortage of Orbiters isn't the problem with the Shuttle system.

Storage? Like they will use old outdated crap over again? Recycle it, or at least built some kind of robot out of the scrap so the kiddies will be all excited!