www.hkdefense.us/pages/military-le/handguns/usp45ct.html

I know not groundbreaking but new anyway.

SHIT! Yet another H&K I'll have to buy eventually!  

i wonder if i could get a threaded barrel like that in .357 sig?

I emailed CCFA to see if they plan on making a threaded .357 SIG compact barrel for use with their Vortex Flash Suppressor.  I will keep you posted on their reply.

does anyone know what kind of price these will have.

Does this have all of the same features as its big brother.  Like adjustable trigger, sites etc.

No.  So far as I know it is just a compact with the threaded barrel and sights.  The Match trigger kit cannot be used on the Compacts so if HK did want a match trigger on this one, they would have had to design a whole new system.  
It's a nice pistol, but nothing anyone with $200 couldn't replicate with a CCF or Jarvis barrel, and the Jarvis barrel would be o-ringed whereas the Compact barrel is not.  Other than being tall, there is nothing all that special about the sights.  They aren't adjustable or anything like that.