i have spent quite some time looking for something simple like this but haven’t found anything yet. all i want is something like a project with 2 cubes that can each be moved via network. no fancy inter/extrapolation or game chat etc. – just a short, simple example/tutorial. does such thing exist?
Quite a few I think. In fact, the Ultimate Networking guide (unless it’s changed since I read it last year) starts you with just that and then moves onto the more fancy stuff. So does the Penelope tutorial… So does the uLink example PDF… so does that space demo that Unity has on the resources page (I can never remember that darn game’s name!) they created a pretty decent networking tutorial using that and again, started simple with: create a plane, then create a sphere, now add this component, now hit play and then went all fancy on your arse!
I think there was more but I can’t recall them right now… Do a search for “Zero to Hero” or you can buy the one on the asset store or you can go to Unity’s resources section and download Penelope.
Have fun 
I almost laughed out loud
I think we’ve got what you are looking for.
A simple project with some cubes moved via network:
A simple chat with rooms created on the fly:
http://developer.exitgames.com/demos/chatdemolive
Interpolation and everything else is up to you and your game needs.
The source for both samples is in our Unity Client SDK. Download the Server SDK, too, so you can run your own server within 5 minutes.
Told you there was more 
Oh thank you! I’ve been at Unity for a while and I admit, networking is one of the things I’ve always get stumped on. This might really help me understand more about them.
Wow, very useful thanks !