Apple seems to have combined their old Just for You technology with their new Genius. The Just for You section on the front page is back, and if you have the Genius sidebar out and don't click on a song (if you can't, try a small playlist) it says "Genius Just for You" and gives some recommendations. If I click on something that iTunes doesn't have, such as my AC/DC songs, it still shows the top 10 songs and albums.
