Downloaded and installed Intrepid Ibex. What you see here are my first screenshots of the system I installed within VirtualBox.
First verdict: I really don't like the new wallpaper. I think Hardy Heron had more charm to it; this one looks like, well, a blood spatter.
Other than that, there aren't too many user-interface changes that I can see, which means, hopefully, that the transition should be smooth. (I'm planning to keep Hardy for my main system though; everything else will be virtualized.)
The new login screen: a little darker than I'm used to, but not too different.
A minor change in the installation process: Ibex now has TrueCrypt, which allows you to encrypt files and folders. This prompt now pops up during the install.
Continuing from above.
I'll post more over the coming days.