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That's a surprise, I thought it will be PHP6 feature.

I supposed it as well!

This is a wonderful news, however I find a little bit tricky the need to use import selecting a runtime namespace using 'as'.
It would be better to be able to declare

const Foo::Name = 'David';
echo Foo::Name;

(or something like this) instead of

namespace Foo;
const Name = 'SomePackage';

import SomePackage as Foo;
echo Foo::Name;

Is it just me or is the summary on dzone insanely redundant

Good news. This will make many things easier and a lot more organized.
Also namespace qualified constants are cool.
weppos are you sure the "as" will be needed in your example? following the example i think you could say f.i.:

namespace Foo;
const Name = "x";

...

import Foo;
echo Foo::name;

So how can I edit my comment?

anyway it should be
echo Foo::Name;

I'm looking for more docs about it.
IMHO it would be perfect a statement like

namespace Foo {
const Name = 'David';
}

echo Foo::Name;

:)