Vegas gambles on downtown upgrade  Sign greets people to Las
Vegas   Renita Jablonski: In the midst of this housing bust,
downtown Las Vegas is going forward with a $6 billion project.
It includes a Frank Gehry-designed brain research center, a
casino and tons of new residential space. Workers break ground
today on infrastructure fixes. Jeremy Hobson has more.  Jeremy
Hobson: The project called Union Park is funded almost entirely
by private money. And that's part of the reason it just might
work, says Jeff Soule of the American Planning Association.
Jeff Soule: The importance of the balance between the city
setting the framework and then encouraging developers to come in
and play a role in that overall vision, I think that's the only
way great cities are developed.  Soule says the project is
attractive to investors because of its comprehensive plan and
because of its location in an existing and walkable downtown
area. But there's another reason Vegas can keep a massive
project like Union Park going during a