Yes, in just a little over 2 weeks the predecessor of Intrepid will be finalized and ready for stable use. At the moment you can still download the BETA and give it a try — something I did and found not much (if any) difference between Jaunty and Intrepid. Of course there are all the “under the surface” changes which help to further iron out the wrinkles in the system and make things run faster and smoother.
Just yesterday I downloaded the ISO for Jaunty Beta and installed it in VirtualBox to give it a try (this is what I do with most any OS before actually installing it) and went through the installation as I always have done in the past — However it would never boot off the hard drive and would only work as a Live Session running off the ISO. This was disappointing and made me decide to wait till the final stable release was made.
I still use Ubuntu 8.04 (Hardy Heron) and will probably only upgrade with the next LTS release, or maybe if there is some major milestone release before then. Ubuntu 8.04 works super for me and I recommend it to all those looking to change to Ubuntu from Windows with as little hassle as possible.