There is a exhibition named "World Top Products Comparison Exhibition" which is held in Suwon (not Busan) in Korea from July 7th to July 17th.

The exhibition is held to compare World Top Class Electronics to Samsung's products.

Most of Samsung high level managers will attend to the exhibition. But the exhibition is not open to public cause of security reason.

And there is a guy who attended the exhibition and touched NX-10 yesterday and he posted short comments about NX-10.

http://www.slrclub.com/bbs/vx2.php?id=samsung_forum&no=109319

It is a Korean web page.

I will summarize his comments from the thread.

Model Name: NX-10 -- IT IS ACTUALLY WORKING ONE!!
It is very small and light!!
Good grip.
Stays on Mockup Design but a little different (additional parts added)

Lens: 3 ( Standard Zoom, Telephoto Zoom, Prime)
He checked Standard Zoom and Prime lenses are working.
All 3 lenses have "SAMSUNG" mark.
Prime is very small.
Has OIS ON/OFF button on it.

He didn't mention about GX-30.
He didn't check Prime lens speed.

That's about it.

The rumor is actually true!!!

I believe there will be more people who will attend the exhibition and see NX shortly. Soon to be revealed I guess.