I just downloaded and installed the newest version of iTunes. After using it for just a couple minutes I already love it. It looks very clean and crisp. The new features are easy to use and they have added some really cool things like iPod Summary and iPod Games (hopefully when my wife sees these she will be more willing to spring for a 30 GB video iPod).
If you are an iTunes user make sure you take a look at the overview and then get iTunes 7.0 right away.