Also, if you want to get really close to the older version of iTunes without having to go through the whole process of uninstalling and backing up and everything else, I figured out a couple things to do that'll give you essentially the "original" iTunes look with a different skin. First, what you want to do is go to "view" and select "show side bar" this will give you back the bar on the left with all your playlists and devices. Next, go to "view" and select "show status bar" this will put back the bar on the bottom that shows the number of songs, time, size, etc. Then, on the top where it has the different tabs songs, artsits, albums, etc, select the songs tab, and only use this tab. Under those top tabs it will give you the old orginization or sorting columns that the previous versions of iTunes had. Finally, click view again and then select "view options" and that is where you can customize the columns that you want to be able to see and set up the orginization the same way that you had it on your old versions of iTunes. If you only use the "songs" tab at the top then it will essentially be the same as all the other iTunes, just with a different style or theme.
I also noticed that with this iTunes that the "get album artwork" function works MUCH better. In the previous versions I'd select ALL songs and select get album artwork and it wouldn't really find anything. It would show the status at the top; searching 280 of 3230 or whatever, and when it got done I would only notice a couple new albums with artwork. I just did this a minute ago and it found over 1,000 new albums, almost all of them have the picture now. Only 318 of my 2,800 different albums couldn't be found.
Someone earlier also mentioned something about the columns not being big enough because it wasn't full screen or somehting like that, so I thought I'd add that if you put your cursor on the vertical lines you can move it to be bigger or smaller so you can see all of the title. Also, if you have a Mac you can click the arrow's in the top right corner for the full screen.